Brittle Hollow

*This article contains spoilers!* Outer Wilds and Echoes of the Eye should be played with minimal spoilers, knowing too much will hinder the experience!
Please play the game before reading any of this! (Or don't, I'm not your dad.)

## Brittle Hollow

* Start of loop
* Middle of loop
* End of loop

### Location

3rd planet

**Brittle Hollow** is the third of six planets in the Outer Wilds' solar system. Befitting its name, the planet consists of a brittle, rocky crust, surrounding a hollow interior with a large Black Hole serving as the planet's core. Regular bombardments from the planet's moon cause fragments of the fragile crust to break over the course of the loop, falling into the black hole core.

The planet is home to numerous Nomai structures scattered both on and under the planet's crust, including the enormous Hanging City, the Tower of Quantum Knowledge, the Southern Observatory, a Gravity Cannon, and the Black Hole Forge used by the Nomai to craft the warp cores for the Ash Twin Project.

## Details

### Features

Brittle Hollow is a highly unstable planet that formed naturally around the black hole at its center. Its dry, rocky surface is fractured and prone to collapse, and in each 22-minute cycle of game time, the player can observe as most of the planet's crust breaks away and falls into the black hole. These pieces then emerge at the White Hole next to the White Hole Station. This collapse is precipitated by the balls of lava ejected from the planet's moon, which rain down steadily and crash into Brittle Hollow's surface.

Traversing the planet's precarious remains is a challenging task, but despite the likelihood that a player will slip and fall into the black hole, the fact that White Hole Station lies very close to the black hole's exit point means that the planet's long falls are less dangerous and more inconvenient.

Escape Pod 1 resides on the surface, its metal tempered by the heat of its descent to the planet. From the escape pod the player can follow a trail of precarious wooden bridges created to span the gaps between rocks, indicating that the enormous drop towards the planet's core existed millennia ago when the Nomai first entered the system.

The planet's two poles are topped with snow, and the north pole has flowing water. This leads to ice formations beneath the surface into which the Hanging City is built.

The rest of the planet's interior is made up of a mixture of blue metallic and red crystalline rock formations. The geometric lattice of these formations exhibit clear fracture points and planes of weakness, which makes it susceptible to the collapse that the player can witness in action during the game.

### Hollow's Lantern

Brittle Hollow is orbited by the volcanic moon, Hollow's Lantern. The lava level slowly lowers as time goes on. The balls of magma that shoot from the moon crash into the surface of the planet, precipitating the collapse of the planet's crust. The Nomai named Root used the moon's lava to heat-test mineral samples supplied from the Nomai mines on Timber Hearth. These samples were then used to encase the Ash Twin Project.

## Locations

### Northern Glacier

The icy northern pole of the planet, which possesses several ruined Nomai structures lying above the Hanging City. The Nomai warp receiver connected to the White Hole Station's warp tower is present here, and nearby Nomai writings discuss the negative time discrepancy between warps.

A larger ruined building possesses two gravity lifts connected to the Hanging City, but the lift down into the city is blocked and non-functional. However, a flowing river runs through the Glacier, at the end of which a hidden hole leads down into the Hanging City. The river flows into this hole, creating a waterfall that leads into the City's Meltwater District.

### Hanging City

**The Hanging City** is the biggest Nomai settlement in the Solar system, hanging to the thick ice under the Northern Glacier where the planet's crust was stable enough for a long-term settlement. Having moved from the Old Settlement, the Nomai in Brittle Hollow both survived and thrived.

The City is divided into four districts located on top of each other, all accessible by a tall vertical passageway with gravity panels.

From highest (nearest to the surface) to lowest, the districts are the Black Hole Forge District, the Eye Shrine District, the Meltwater District, and the School District. The vertical passageway is broken near the top, cutting off conventional access to the Black Hole Forge District.

#### Black Hole Forge

The Black Hole Forge is a massive Nomai structure, suspended on rails attached next to the Hanging City. The Forge itself can be moved along these rails from a control room in the Meltwater District, and can be raised up to the highest level of the Hanging City, or lowered down to the black hole at the planet's core, where it is by default.

The Forge can only be accessed when raised to the uppermost level of the Hanging City - the Black Hole Forge District, which is constructed entirely out of gravity panels attached to the underside of the planet's crust, therefore being upside-down. The district contains a warp receiver, connected to Brittle Hollow's corresponding warp tower on Ash Twin.

The Nomai used the Forge to craft the warp cores used throughout the solar system from the black hole itself, as well as the Advanced Warp Core for powering the Ash Twin Project. Writings and a diagram within the forge explain the mechanics of warp alignment, with the towers having an approximate five-degree window with which to align with their corresponding receiver's astral body.

#### Meltwater District

The second lowest level of the Hanging City. It is connected to the Crossroads by two bridges, and houses a control room that raises and lowers the Black Hole Forge. Ruined Nomai buildings contain writings detailing methods of procuring an advanced Warp Core for the Ash Twin Project, and leads to a passage to the surface river on the Northern Glacier. The waterfall caused by the river flowing into the hidden cavern lies adjacent to the District, and acts as the District's namesake.

#### Eye Shrine District

The Eye Shrine District, similar to the identically named district in Ember Twin's Sunless City, houses many derelict Nomai buildings and a small shrine with writing detailing the Nomai's thoughts and knowledge about the Eye of the Universe.

#### School District

The lowest district, made for the Nomai children who lived on **Brittle Hollow**. Inside are classrooms with writing explaining the Nomai's history stuck in the solar system and the Nomai tradition of 'festivals'. From here, a long gravity crystal path runs along the underside of Brittle Hollow's crust that leads to the Old Settlement on the planet's equator.

### Gravity Crystal Workshop

A small collection of buildings that lies on Brittle Hollow's surface equator, where the Nomai first designed and constructed Gravity Crystals. Riebeck's first camp can be found here, with directions to their current camp written nearby. Under Riebeck's direction, a gravity crystal passage leading to the underground **Crossroads** can be found within a building overgrown by a tree. Another nearby workshop building is caked entirely in Ghost Matter.

### Crossroads

A two-leveled central hub location under Brittle Hollow's surface, that contains Riebeck's camp, a map of the Nomai structures on the planet, and acts as a central node between most of them. The map depicts the important Nomai locations and pathways that exist between them, though centuries of deterioration means some of the pathways have broken down and will continue to do so over the course of the loop.

The Crossroads can be accessed from the surface by the **Gravity Crystal Workshop** on the planet's equator. The workshop and both levels are connected by gravity crystal paths, with the bottom level also possessing a gravity lift leading up from the black hole, intended to potentially save any who accidentally fall towards the black hole by returning them to the Crossroads.

As depicted in the map mural, the Crossroads connects to the Hanging City, the Gravity Cannon and the Tower of Quantum Knowledge by varying passages, with the latter two also containing pathways to the Southern Observatory. However, the deterioration of Brittle Hollow's crust heavily affects these pathways over the course of the loop.

Two large Nomai bridges lead north to the Hanging City's Meltwater District on the Crossroads' top level. Sections of the bridges will collapse over the course of the loop due to bombardment. A pathway east to the Gravity Cannon is also present, made up of natural crust fragments that must be leapt between to reach the Cannon.

A highway of initially unbroken gravity lifts leads west to the Tower of Quantum Knowledge on the Crossroads' bottom level.

### Gravity Cannon

A massive Nomai structure on Brittle Hollow's equator, intended to launch Nomai shuttles with gravitational force, accessible from the Crossroads or the surface. The cannon is linked to a shuttle belonging to a Nomai named Solanum, now currently on the Quantum Moon. The shuttle can be recalled using the cannon's controls to read the notes inside written by Solanum, just after landing the shuttle on the Quantum Moon and just before setting foot outside.

From the Gravity Cannon, the Southern Observatory can be reached via a series of gravity lifts and broken platforms of crust. However, the gravity lifts are misaligned due to the planet's deterioration, and care must be taken when transferring between lifts using the jetpack. Note that the Gravity Cannon is likely to fall through the black hole near the end of the loop.

### Escape Pod 1

The first Nomai Escape Pod, crash-landed at Brittle Hollow's equator. Opening the Pod's emergency hatch reveals a treacherous and fragile pathway of stairs and bridges leading under the crust of the planet to the Old Settlement. The stairs and bridges collapse with enough force, falling into the black hole if one is not careful.

### Old Settlement

The original Nomai settlement, located on the equator under the crashed Escape Pod 1, where the Nomai inhabiting the pod first made their home on Brittle Hollow, hidden under the surface to shelter from Hollow's Lantern. A pathway of fragile stone stairways and bridges leads to the settlement from the Escape Pod, and also connect the ruined houses and pathways within, collapsing under enough force.

The settlement itself is consisted of scattered Nomai houses and buildings embedded in the underside of Brittle Hollow's crust, with a network of fragile bridges and pathways connecting them. Nomai murals and writings can be found throughout detailing the Nomai's history regarding the Escape Pod's jettisoning from the Vessel, revealing the Vessel's ensnarement in Dark Bramble and the other Pod locations. After a while, the Nomai realized this part of the crust was still too exposed to Hollow's Lantern's bombardment, and they moved north along a gravity crystal path underneath the crust to settle in a safer place, eventually creating the Hanging City.

### Tower of Quantum Knowledge

A massive Nomai tower, suspended from a section of Brittle Hollow's crust where the Nomai found a Quantum Shard, the Tower Shard, and contains information crucial to the Quantum Moon pilgrimage. The tower may be found easily from the surface, or the gravity highway from the Crossroads. A heavily ruined gravity highway leads from the Tower to the Southern Observatory, with many sections missing and gravity pathways cut short, necessitating many great and careful leaps to traverse.

While the tower's bottom level can be easily reached via the Crossroads or walking down from the surface, the upper levels are inaccessible by conventional means at the start of each loop, as the gravity panel path leading into the tower is broken and impassable.

However, the planet's ongoing destruction is likely to drop the tower through the black hole partway through the loop, and, once it exits at the White Hole Station, can be freely explored in zero-gravity.

The surface of the Tower contains the Tower Shard and other quantum objects affected by the Shard. The Shard itself has a Nomai writing wall attached to it that also transports with it, providing a mild hint to the rule of quantum entanglement.

The upper levels of the tower contain two scrolls (one congratulating a Nomai named Solanum on reaching the last step before she travels to the Quantum Moon, and one on a shelf that reminds the pilgrim that they're taking part in a tradition of curiosity and exploration by following in the footsteps of everyone before them who sought the Quantum Moon) and a Quantum Moon Locator built into the Tower's interior.

### Southern Observatory

A domed Nomai observatory on the south pole. The entrance on the surface is broken from the outside, with the only accessible route being beneath the surface. Riebeck's ship and recorded notes of their plan to search the Nomai ruins on the equator for a path underground lie outside the surface entrance.

The Observatory can be accessed from underground via the broken gravity pathways from the Gravity Cannon, requiring care to traverse and move from pathway to pathway without falling.

Within the Observatory is an Eye Signal Locator, built after and more sophisticated than the Locator on the Attlerock. The Locator's modules can be individually activated to show the orbits of each planet in the solar system, including the Eye of the Universe. However, the Locator is also unable to locate the Eye's orbit, erratically creating models of potential orbits instead.

On the same level as the Locator controls are two conversations about the Nomai's ongoing search for the Eye. One covers what they know about the Eye so far and laments their lack of progress finding it. In the other, the Nomai Mallow suggests simply launching a probe into the outermost reaches of the solar system to see if it happens to find the eye. Cassava points out that the odds of randomly firing the probe at the correct trajectory to find the Eye were extremely small, but Conoy points out there's another ongoing project that could take luck out of the equation.

Also contained in the Observatory are two active models of Giant's Deep cyclones, created by a Nomai named Spire to aid the team building the Orbital Probe Cannon. The models depict two varieties of cyclone - the most common spinning clockwise and upwards, and a rare variety that spins anticlockwise, and forces things downwards instead. Next to the entrance is a projection stone of a conversation with the team building the orbital probe cannon on Giant's Deep, who had been using the cyclones to launch parts into orbit only to have one piece unexpectedly driven beneath the ocean's usually-impassable current. Spire very much wanted to make a model.

## Texts and recordings

The journey here from the south pole has been, um... I’m going to go with “harrowing”, because of the, um, all of the meteors. But hey, at least I made it here unconcussed and not on fire!
Okay, let’s see... I poked around a little, and there’s some sort of old Nomai path that starts across from my campsite, inside the ruined building with trees growing out of it.
Doesn’t look like anything horrible - just stairs leading down. I can handle stairs! After I get my supplies together, I’ll follow the path and see where it leads.
Hurgh. Well. That was... deeply unpleasant. I made it this far, though. Guess that’s the part to focus on, and not how I’ll eventually have to get back up that path.
But wow, this place sure is something! Looks like the Hanging City is north from here. And east is a gravity cannon! I definitely want to see that
And another thing - I’m detecting oxygen from somewhere below. Which is good, since I, uh, used up a lot of my supply screaming during the trip down from the surface.
As soon as I stop dry heaving, I’m going to head farther down below so I can refill my tank.

BEGIN FLIGHTLOG: Escape Pod 1. Vessel has been mortally injured. Emergency sequence activated. Awaiting departure from Vessel.
Launching Escape Pod 3... Launching Escape Pod 2... Now launching Escape Pod 1.
ALERT. Collision imminent. Preparing for impact.
Scanning external environment... Scan complete. Minor structural instabilities detected. Pockets of breathable air detected. Adequate solar energy detected.
Verdict: HOSPITABLE.
THATCH: Is everyone unharmed?
PLUME: No one was badly injured from the escape pod’s impact. We’re incredibly fortunate.
THATCH: This is good news, at least. Have we heard from Escape Pod 2 or Escape Pod 3?
FILIX: No, I... I’m unable to make contact. My equipment can hear the other two escape pods’ distress signals, however. If it’s any comfort, both pods must be structurally intact.
FILIX: I’ll continue calling for them.
THATCH: My gratitude. If we can —
PLUME: Thatch, the moon is approaching again!
THATCH: Everyone brace yourselves, swiftly! The volcanic moon has returned!
THATCH: Be cautious of falling ash and debris!
PLUME: ...I believe the moon has passed.
FILIX: This planet doesn’t appear eager to have guests. We are certainly unwelcome on its surface.
THATCH: We need to find shelter, and quickly. The volcanic moon won’t be gone for long.
PLUME: I observed several promising sites below the surface, but we’ll need to construct a way for everyone to climb safely down this cliff. Perhaps we could build platforms?

The shuttle is currently resting at the Quantum Moon.
Call the shuttle home
Activate the gravity cannon
SOLANUM: I’m at the shuttle! I’m ready to make my first pilgrimage to the Quantum Moon.
BELLS: That’s exciting! You’re almost ready, but there’s still one more rule you need to learn. Come see me at the Tower of Quantum Knowledge.
BELLS: The tower is on the opposite side of Brittle Hollow. If you follow the path west to the Crossroads, you can reach the tower from there.
 **Solanum's Shuttle recording**
SOLANUM: I am here! After watching it wander the skies for so long, I am about to stand (for the first time) on the Quantum Moon.
SOLANUM: As expected, my shuttle has landed at the moon’s south pole. I will make the remainder of my journey on foot.
SOLANUM: We don’t know why the Quantum Moon always welcomes its visitors at the south pole, just that this is true.
SOLANUM: As a child, I considered such unknowns sinister. Now, though, I understand they bear no ill will. The universe is, and we are.
SOLANUM: I am ready.

CLARY: I have good news, Yarrow! The advanced warp core is ready to be installed in the central chamber of Ash Twin.

YARROW: I’m intrigued, love! Everyone here working on the Ash Twin Project is excited to see it (Pye is beside herself with joy!).
POKE: No, it isn’t!
YARROW: Is everything well at the forge?
CLARY: Don’t worry, love; Poke is only nervous. The core is extraordinary, and her design work is beautifully clever.
POKE: The core’s durability could still be improved! I need more time!
CLARY: Ignore her, Yarrow. The core is finished. And if my sister tells you otherwise, then she will be finished, as well. | **Aligning towers**
CLARY: Regarding the warp towers on Ash Twin: Does each tower have to be perfectly aligned with the center of the astral body to which it’s tuned?

CLARY: I enjoy precision as much as the next Nomai, but if, for example, a tower’s base were to shift even slightly, that tower might no longer align with its astral body.
CLARY: More accurately, I enjoy precision as much as the next Nomai, provided the next Nomai is not Poke.
POKE: We don’t need the alignment angle to be exact; it only needs to be within five degrees of the astral body’s center.
POKE: Of note: This gives us a slightly longer warp window. I imagine this window will last roughly several seconds.
WARNING: Be cautious near the boarding area while the Black Hole Forge is in operation.
ROOT: Where am I taking this first black hole core? (And where am I taking the remaining cores once they’re ready?)

POKE: The white hole cores are for the warp receivers. Each of the six receivers are being constructed at different locations, so those deliveries will be a greater pain in your cervical spine.
POKE: The tower designs in the High Energy Lab on Ember Twin reveal each receiver's location. Ask Yarrow; he is familiar with them.
CLARY: All of the warp towers are being constructed on Ash Twin, so the black hole cores will go there.
ROOT: My gratitude! In that case: Poke, Clary, I’m leaving for delivery! I’ll send Yarrow your regards.
CLARY: Poke, I’ll return to the forge shortly; I’m going to catch up to Root and help him deliver the first core to Ash Twin, just to make sure Yarrow receives it.
POKE: Of note: Yarrow believes he spotted a flaw in the warp tower designs: namely, that one of the warp towers on Ash Twin will never activate, because its warp receiver will never align overhead.

POKE: Does your romantic interest think a warp tower’s alignment point is its receiver? Does he not know that a warp tower always aligns with the center of its corresponding astral body?
CLARY: That isn’t an unreasonable belief, given the receiver does have to be located on (or in close orbit around) the relevant astral body.
CLARY: I seem to recall that was your understanding of warp technology, at first.
CLARY: No, Yarrow understands the distinction. He likely doesn’t realize the Hourglass Twins are so close together they function as a single astral body, with a shared alignment point in between them. | **Warp platform (*dependent on in-game time, arrival time is always one hundred-thousandth of a second earlier than departure time*)**
Departure Time: XXX.XXXX
Arrival Time: XXX.XXXX
Return warp status: CHARGED. Step onto warp platform when ready.

The Ash Twin Project requires a powerful, highly advanced warp core. How should we obtain it?
Solution 1: We could retrieve the warp core from the Vessel.

RAMIE: The Vessel's warp core is broken, at best (recall those present when the Vessel crashed said it sustained lethal injuries). There is no guaranteed reward for this risk.
CONOY: Perhaps we could still repair it. My grandmother told me there was little time to assess the nature or extent of the damage.
CASSAVA: Even if it no longer functions, the old core could be a valuable blueprint, provided we’re able to transport it back here.
PHLOX: This would require a return to Dark Bramble. Plume (my father) said many good Nomai perished there.
CYCAD: My mentor (Coleus) and his old mentor once discovered and studied an anglerfish fossil on Ember Twin. Using that knowledge, we could avoid the anglerfish entirely!
COLEUS: What Melorae and I learned from that fossil would theoretically help us evade the anglerfish, but our hypothesis was never tested on a live specimen.
Solution 2: We could craft a new advanced warp core inspired by the Vessel’s warp core.

OENO: The greatest challenge here, I think, is we don’t have the design for such a powerful core, or any of the original crafters of the Vessel’s core.
CLARY: No, but Poke was apprenticed to Annona, who created the original design, and our Black Hole Forge is adept at crafting simpler cores.
POKE: I believe I can be of use here! The Vessel’s warp core was created before my time, but Annona explained many of his designs to me.
IDAEA: This is the safest path for our clan.
AVENS: Is the safest path the best one? Our goal is worth the risk.
CASSAVA: Is it, though? We’ve tried for so long to find something that I (and others) now believe might be impossible to find. If the search for the Eye is a futile one, we should choose the option with the least potential for harm.
SPIRE: Abandoning the Vessel’s warp core and its casing means losing valuable knowledge.
MITIS: This is true; however, it’s knowledge we have little hope of recovering. It would be best to relearn, I think.
POKE: I would very much like to craft such a powerful core! More relevantly, I believe the Black Hole Forge crew and I could recreate the basic design. | **Poke's thoughts on warp core creation**
POKE: I feel strange, trying to recreate Annona’s warp core without him. At times, it still feels strange to no longer be his (very young) apprentice, and for the Black Hole Forge to be in my care and not his.

POKE: Hypothesis: This will always feel strange. Even though my time with him was short, I miss my old mentor, and deeply.
POKE: To have the chance to try is thrilling, but... I don’t want to disappoint everyone. I think I can do this (probably), but what if excitement has clouded my assessment of my own abilities?
POKE: Was I wrong in volunteering to build it...? I was born in this star system, and never saw Annona’s warp core with my own three eyes. I only know what he taught me. What if I’ve bitten off a larger portion than I can consume?

CASSAVA: I imagine I’ve been hard on Poke, again. This in turn means I’ve made things difficult for her sister (Clary).
CASSAVA: If Poke and I are oil and water, Clary is our emulsifier. She certainly makes us a better team than would mixing through shaking (although sometimes I would like to shake Poke!).
CASSAVA: Jokes aside, suppose my own fear of never finding the Eye prompted my argument with Poke. That would be immature of me.
CASSAVA: I should apologize... At least to Clary, who could then tell Poke.
Be welcomed in this place. This shrine is a space to reflect on what brought us to this star system: the signal from the Eye.

We observed the Eye’s signal in our travels, and followed it here to find its source.
What we know is this: The source of the signal (which we have chosen to call the Eye of the universe) is older than this universe itself. The rest, we have yet to learn.
What is the Eye’s signal?

Suppose the Eye wishes to communicate.
The signal is a call. Were we the intended audience?
The signal is the Eye’s voice. It speaks a language we don’t yet know.
Or maybe the signal is the Eye’s attempt at expressing itself.
Of note: From the signal, we were able to determine the Eye’s approximate age (or perhaps its lack of age?). | **Eye age**
How can the Eye be older than the universe itself?

Suppose it is a relic from a previous universe.
The early universe was unimaginably hot and dense. If anything existed before, it would have been destroyed.
SOLANUM: I no longer believe, as I did as a child on Ember Twin, that the Eye of the universe (the source of the signal) wishes to harm us. But it may not want to be found, either.

SOLANUM: In fact, the Eye may not have wishes at all. We have no evidence supporting this.
SOLANUM: The terrible circumstances of our arrival here were almost certainly exactly that: circumstance.
SOLANUM: I suspect imagining we are special to the Eye in some way is wishful thinking. The Eye might have called out to any sentient species.
SOLANUM: Or it might not have been calling out at all, and that my ancestors heard the Eye’s signal holds no great, deep meaning.

LAMI: Explanation of Festivals

LAMI: All the Nomai clans from all over the universe meet in one place to share what they’ve learned in science and art. It’s called the festival!
FILIX: Don’t forget, festivals happen every ten years!
LAMI: We can’t go because we’re stuck here. But Filix says we used to go, too.
LAMI: At some festivals, one clan’s big discovery can mean all the Nomai get to advance, too. Like Annona’s warp core, which made it so everyone can warp long distances and explore more.
LAMI: Each clan has a festival envoy to show their most interesting work. (Our envoy was Thatch!)
LAMI: A single festival could last a long, long time! | **Ilex new Vessel arguments**
ILEX: Why We Should Build A New Vessel

ILEX: Each Nomai clan explores the universe in its own Vessel. The Vessel is the heart of every clan.
ILEX: It’s unusual for Nomai to remain in one place for so long. Nomai are wanderers and have no permanent home.
ILEX: If we built a new Vessel, we could return to our adventurous way of life. Imagine all the new places we could go! Our clan wouldn’t be stuck here in this star system.
ILEX: We could even meet with other Nomai, and learn from them, like Coleus says we used to do.
ILEX: It probably wouldn’t be hard to get parts if we stopped building other new things, and if we broke down other structures (like the towers on Ash Twin) for parts.
ILEX: We might have to build a smaller Vessel for now, even though Vessels are normally large. But we could make it bigger later once we reach planets with more resources.
ILEX: It would also help if we stopped building so many things to search for the Eye of the universe. I asked Yarrow, and he says we use lots of resources on the Ash Twin Project.
SOLANUM: Formation Of This Universe

SOLANUM: No one knows how this universe was made, but one thing we do know is everything used to be very hot and very dense (tightly packed together).
SOLANUM: As this early universe expanded, it also cooled down. Once it had cooled down enough, particles were able to group together to form things like galaxies, stars, and planets!
SOLANUM: Since then, space has continued to expand at a faster and faster rate, which is hard to think about for too long without your brain hurting.
SOLANUM: This universe will keep getting colder and larger, until one day, the stars and the life they support will all die.

FELDSPAR’S SPARE JETPACK FUEL
It’s annoying to schlep across the planet to the ship if I can’t use my jetpack, so I’m leaving this here.
I checked with my Little Scout — I do>too use it, Hornfels, ya burnt marshmallow — and the scout’s integrity reading said this piece of Brittle Hollow is as stable as any, but who knows.
If the fuel’s still around, feel free to use it. If not, well, wherever you’re reading this note, I’m sure you’ve got bigger problems.
FILIX: Has anyone observed the phantom moon that sometimes greets us in the night sky? Your thoughts interest me.

THATCH: I compliment your eyes! How do you imagine it disappears? Hypothesis: Could it be a shift in the light spectrum?
PLUME: Suppose this moon is too shy to show us its face.
PLUME: I’m interested in your playful moon. Is it much like its violent friend (Hollow’s Lantern)?
THATCH: Imagine if there were *two* volcanic moons.
PLUME: Then I imagine there’d be none of us left!
FILIX: Hypothesis: There can exist too much lava.
THATCH: I’d strongly prefer we test the null hypothesis.
FILIX: This moon isn’t volcanic (to my unaided eyes). Sometimes it leaves its friend Hollow’s Lantern for nights at a time.
CLARY: To our friends on Brittle Hollow: I just warped here from the White Hole Station (on the other side of Brittle Hollow’s black hole)! Our design worked; we’ve successfully recreated warp travel!

FILIX: This is wonderful news! I can’t wait to see the warp tower (although it’s been a long time since I’ve jumped through a black hole!).
POKE: I don’t know how close it is to Annona’s original design, but as long as what we’ve built works, then I’m delighted! I knew we could do it (Cassava, I hope you’re reading this)!
POKE: Wait, this can’t be correct. Clary, have you seen these readings? If they were accurate, they would violate causality. There must be an equipment error somewhere.
POKE: I’m returning to the White Hole Station. If you and Root meet me there, we can run a full diagnostic and hopefully locate the problem.
POKE: (Don’t tell Cassava.) | **Warp platform (*dependent on in-game time, arrival time is always one hundred-thousandth of a second earlier than departure time*)**
Departure Time: XXX.XXXX
Arrival Time: XXX.XXXX
 **White Hole Station arrival and departure times**
PYE: Ramie and I reviewed the records you sent, Poke, and they appear to show Nomai are arriving at the warp receiver on Brittle Hollow slightly *before* departing from the White Hole Station.

POKE: I understand it’s exceedingly odd, but Clary and I have tested and retested the equipment, and the result is the same every time someone warps.
RAMIE: The interval is incredibly miniscule (roughly one hundred-thousandth of a second). Do you suppose our instruments can’t accurately measure time to such a small degree?
PYE: As I’ve already told Ramie, these measurements can’t be accurate. How can a Nomai arrive on Brittle Hollow before he or she ever stepped into the teleporter? The implications are absurd.
POKE: I don’t disagree. It *would* mean I’ve inadvertently broken several fundamental theories regarding this universe. We would have to reconsider all of our beliefs about the nature of time.
RAMIE: Yes, I hope so, too!
RAMIE: Poke, as Pye is confident the reading is inaccurate, she’s kindly helping me attempt to recreate this phenomenon at the High Energy Lab. We’re designing an experiment to take more data.

PLUME: Of note: Be sure not to wander far from here. Though this area is somewhat unstable, it’s safer than any we’ve found so far.

PLUME: The temporary settlement is finished, but remember to be cautious of falling rocks and dust created by meteor impacts | **Eye signal knowledge**
THATCH: This knowledge is too dear to lose: Here is everything we can recall about the signal we encountered while aboard the Vessel.

FILIX: The signal looked like an eye: round, with a circle at the center much like a pupil. (Suppose the signal was looking for something.)
FILIX: The signal was older than the universe itself! This is the most significant detail.
PLUME: No Nomai clan has ever encountered anything like it! How can anything in this universe be older than the universe itself?
THATCH: I can’t understand. Why did the Vessel crash in that place?
PLUME: Was the Vessel unwell in some way?
FILIX: No, Annona and I checked before the warp, and the warp core and navigation systems were both well.
FILIX: We warped to follow that curious signal from the Eye of the universe. Where we arrived was wrong; it wasn’t where we tried to go.
THATCH: Suppose it wasn’t a problem with the Vessel, but with our destination.
FILIX: I’m afraid for our friends in Escape Pod 3....
PLUME: My brother wasn’t in Escape Pod 1 with us. Was he in Pod 2, or Pod 3? Was he able to board an escape pod at all?

PLUME: The pain of your absence is sharp and haunting, and I would give anything not to know it; anything but never knowing you at all (which would be worse).

PLUME: I can only hope that you are safe, Keek, wherever you are. | **Foli missing**
KOUSA: We can hear the other escape pods’ distress signals, which gives me hope. Foli, are you still here? I am unsure how to survive in this place without you.

THATCH: Is the hardest part of this tragedy not knowing who we may have lost? Or will the hardest part come later, when we learn? (Be well, Aunt Melorae...)
ILEX: Look out, look out below!

ILEX: Look out for the gravity hole!
ILEX: For should you slip
ILEX: And lose your grip,
PLUME: Use caution! A black hole sleeps below. You must not slip.
PLUME: Given concerns about our settlement’s stability, where should we construct a new, less temporary shelter?

PLUME: I believe we should migrate to the northern glacier.
FILIX: What if we use gravity crystals to craft a stable path?
THATCH: Building beneath the crust again would shelter us from the volcanic moon’s eruptions.
THATCH: We need to stay close to the escape pod so Filix can monitor incoming messages. We can’t be rescued if we aren’t present to respond.
FILIX: I don’t believe anyone is coming to save us, Thatch. Now we must save ourselves.
PLUME: I agree. We’re here because the Eye’s signal called to us and we followed. If we’re to find it, we need to not merely survive, but thrive.

CASSAVA: Conoy, Daz and I were lifting Orbital Probe Cannon components into orbit for assembly, and one somehow sank down down(sic) *beneath* the current.

DAZ: Conoy, you should’ve seen it! We’d thought it was impossible for any cannon components to sink even partially below the current, but ours sank straight to the core!
DAZ: Cassava convinced me not to try to recreate the phenomenon myself using other cannon parts, but we’re very curious to know what happened! How could something pass through the current?
CONOY: My gratitude for your interesting question! This is exciting: Spire constructed a model of Giant’s Deep here at the Brittle Hollow’s Southern Observatory, and it's revealed how an object might sink below the current.
CASSAVA: Conoy, I’m unable to grasp the answer by looking through the projection pool. If I visit the observatory, would you kindly explain?
CONOY: If you don’t mind the trek beneath the surface to the south pole, I’d be delighted to see you! (There are two trailheads, one at Brittle Hollow's gravity cannon and one at the Tower of Quantum Knowledge.) | **Giant's Deep's cyclones**
CONOY: Cassava’s Construction Yard has been using the cyclones on Giant’s Deep to lift Orbital Probe Cannon parts into orbit, but one component was pushed down past the current that usually prevents anything from sinking.

CONOY: Spire and I are crafting a model to determine why this happened.
SPIRE: An update: It’s now clear there are two different types of cyclone.
SPIRE: Most cyclones on Giant’s Deep rotate clockwise. These are the cyclones Cassava typically uses to send components into orbit.
SPIRE: There also exists a rarer type of cyclone that spins the opposite direction and pushes objects beneath the waters and below the current.
CASSAVA: My gratitude, Spire. Conoy is showing me your handiwork, and I’m intrigued by this secondary type of cyclone. But was it really necessary to build a model to tell me that?
SPIRE: The model will be useful as we continue monitoring Giant’s Deep.
CONOY: What have we learned thus far in our search for the Eye of the universe?

MALLOW: Based on our knowledge of the Quantum Moon, we believe the Eye is in orbit around this star system’s sun. This would mean the Eye is located within a finite (albeit enormous) range.
PLUME: Those of us on the Vessel originally followed the Eye’s signal to this star system, but we were unable to warp to the Eye itself.
PRIVET: The locator we built on the Attlerock and the new, more sensitive locator we built here were both unable to detect any trace of the Eye’s signal.
AVENS: Hypothesis: The Eye has stopped emitting its signal.
CASSAVA: Suppose the Eye doesn’t wish to be found.
PLUME: Cassava, how can you suggest that? The Eye’s signal called out to summon us to this star system!
CASSAVA: I’m aware; I grew up hearing the Eye’s story. Yet we’re no closer to finding it than you were when you first arrived here. | **New methods to search for the Eye**
CONOY: How should our methods change as we continue our search for the Eye of the universe?

PRIVET: As we couldn’t find the Eye’s signal using two different devices built for this exact purpose, we should discontinue this search method.
MALLOW: We know what the Eye looks like thanks to the Quantum Moon, so what if we try to find the Eye visually, instead? Let’s send out a probe!
CASSAVA: Mallow’s idea is clever, but we have no idea where the Eye is in relation to here. The probability of launching a probe in the correct direction would be absurdly small.
CONOY: I believe I have a solution for that problem! Have you spoken with Ramie and Pye about the technology they’re developing?
AVENS: We’d need to build a probe-launching mechanism to cover those long distances quickly. A cannon in orbit around a celestial body would circumvent the need to escape gravity’s pull.
CASSAVA: Giant’s Deep would be a good choice. It’s furthest from the sun, so it would provide the best angles for launch. And it’s moonless (except when the Quantum Moon is visiting).
ERROR: Unable to determine orbit. No signal detected matching any known criteria for the Eye of the universe.
I’m here! I did it! I put the ship down safely!
Um, in that the ship went down, and I didn’t sustain bodily harm. A few minor repairs, and it’s like the ship never even hit those rocks!
One of my better attempts. Feldspar would barely have laughed at me, I bet.
That’s the good news. The bad news... I, uh, haven’t found a way inside this structure yet. The door is broken, and I know I’m not great at exploring, but I think I would have found a different entrance by now if there were one. P... probably.
I can’t get inside from *here*, but I know there are paths below the surface. I’m going to head north to the ruins on the equator to try to find a way down.

PLUME: The trees are moving! The trees in this grove wander about freely (the entire plant, roots and all)! This is not normal, even for this alien planet. And I never see them move! Is that even possible?!

PLUME: If anyone else witnesses this disturbing behavior, I implore you, record your observations here. Either these trees are aberrant, or my brain must be!
THATCH: Plume is right; the trees do move! I confess I didn’t notice until I read his notes.
THATCH: Alarmingly, it isn’t only the trees: There is other matter in this area (such as that unusual shard of rock) moving in this same eerie way.
FILIX: That rock is unusual for another reason, too, Thatch: It possesses color and texture I’ve never seen elsewhere on this planet!
FILIX: Hypothesis: This rock shard’s presence is significant. We should study it! (Could it be what is causing other nearby objects to also move about this area?) | **Tower description from surface**
BELLS: Beneath your feet lies the Tower of Quantum Knowledge.

THATCH: Plume, Filix, and I have determined this atypical shard of rock is the reason objects in this grove are behaving in a quantum manner.

FILIX: Of note: A unique signal is coming from this shard! Curiously, our friend the wandering moon sounds the same.
FILIX: I’ve also heard the same signal this shard produces calling out from Giant’s Deep, Timber Hearth, and the Hourglass Twins. Suppose there are other shards like this one!
THATCH: The only other object we’ve observed displaying this quantum behavior is the wandering moon. I imagine the moon’s behavior and this grove’s are related.
PLUME: In her note from earlier, Filix mentions this strange type of rock isn’t found elsewhere on Brittle Hollow. What if it isn’t originally from this planet?
PLUME: Hypothesis: This “quantum shard” is from the wandering (quantum) moon. Perhaps it is even a small piece of the moon itself. | **Bottom of the tower**
BELLS: Be welcomed in this place! Above you stands the Tower of Quantum Knowledge.

BELLS: If you’re here to make your first pilgrimage to the Quantum Moon, you are almost prepared to set out on this deeply significant journey. Before you do, pause, and remember your history.

BELLS: We make this journey not only for ourselves, but also to honor the members of our clan who came before us: those who, after the crash that brought them to this star system, became stranded on Brittle Hollow and on Ember Twin, with no communication between these two groups of survivors.
BELLS: These Nomai looked upward from two different planets and saw the same wandering moon visiting their skies. It was this moon (the Quantum Moon) that kept their curiosity alive during this long period of hardship.
BELLS: After the two divided groups were able to reunite, it became our clan’s united goal to find and visit the Quantum Moon. This took time, and many Nomai who dreamed of seeing the Quantum Moon died before we discovered how to make the journey.
BELLS: When you reach the Quantum Moon, recall these Nomai, and carry their curiosity onward with you. | **Solanum's mentor**
BELLS: Welcome, Solanum! Your arrival here means you’ve completed your preparations on Giant’s Deep and are ready to depart for the Quantum Moon.

BELLS: On your pilgrimage, the Quantum Moon will carry you, just as it carried me and many in our clan before me, to the moon’s sixth and most secret location.
BELLS: You’ll be aided in your pilgrimage by the shrine our clan built on the Quantum Moon. But remember this final rule: To explore the sixth location, the shrine must be on the moon’s north pole.

## Gallery

* Hollow's Lantern
* Hollow's Lantern nearly depleted of lava
* Hollow's Lantern and Brittle Hollow just before the supernova

## Notes & Trivia

* If you happen to slip and fall towards the black hole, its possible to slingshot yourself around it using your spacesuit's thrusters. There is a conveniently placed gravity lift extending down to black hole's edge, and lucky or skillful players that can maneuver themselves into its path can spare themselves the trek back from White Hole Station. This gravity lift will helpfully deposit the player at Riebeck's camp, which offers a campfire, oxygen, and a fuel tank.

* With lots of luck or skill, you can make various jumps below the surface that traverse almost half of the planet.