Asteria

Asteria, also known as RS 8513-3151-6-127847-241 A4.2, is a moon of the gas giant planet Hugha, which itself orbits an F-type main sequence star called Batt A, being part of a triple star system. Located over 45,000 light years away from Earth, Asteria is a lush habitable Earth-like moon inhabited by many diverse creatures. Although it is so far away from Earth, it is only located about 2663 light years away from the superhabitable moon Kodu, in the same Scutum-Centaurus arm of the Milky Way galaxy. It has an ESI rating of 0.922, or being about 92.2% similar to Earth and is home to the Tashi, a type II civilzation that just achieved interstellar travel.

## Asteria

Asteria, as seen from a Tashian satellite orbiting Hugha

## Surface Conditions

### Atmosphere

* 40.6% N2
* 30.3% 02
* 26.6% H2O
* 2.27 CO2

## Additional Information

### Life

Yes: Organic multicellular (marine, terrestrial)

### Position in Star System

2nd (relative to Hugha), 4th (relative to Batt)

## Moon Information

Asteria orbits the gas giant planet Hugha in roughly the same distance as the Moon orbits the Earth, completing an orbit around Hugha every 47 hours and 17 minutes or roughly about twice the Earth's rotation period. To unknown observing intelligent species, Asteria is renowned for having a sun in the sky that is an F-type main sequence star, again called Batt, which makes plant life on Asteria very bluish-green and the atmosphere have a denser ozone layer, due to the more intense ultraviolet radiation from Batt that hits Asteria. The stronger stellar winds of Batt tho are not a problem for Asteria however, since it is protected by the strong and immense magnetic field of its parent planet Hugha. The atmosphere of Asteria is very similar to the atmosphere of Earth, having an atmospheric pressure of 0.818 atm and an atmospheric composition of nitrogen, oxygen, water vapor and carbon dioxide, though this atmosphere would be unbreathable to humans on Earth due to the high amounts of carbon dioxide and sulfur dioxide present in Asteria's atmosphere. Even though Asteria is similar to Earth in habitability, its size and mass are not, since it only has about 34% the Earth's mass and 70% the Earth's diameter, resulting in a surface gravity of only about 0.694 g or about 69.4% the Earth's surface gravity.

## History

* ~4.6 billion years ago: The planet Hugha forms around a newborn Batt. At some point during this period, Hugha migrated inward towards Batt and collided with an ice giant planet along the way, ditching Hugha's older smaller moons and forming two new, much larger moons orbiting Hugha. Asteria is one of these much larger moons.
* ~4.2 billion years ago: Asteria is hit by multiple comets and asteroids, which would aid in the formation of Asteria's oceans.
* ~3.8 billion years ago: Formation of Asteria's oceans and the switch to its secondary atmosphere, being mostly made up of nitrogen and carbon dioxide.
* ~3.7 billion years ago: First life on Asteria, being small unicellular micro-organisms. These micro-organisms would enrich the moon's atmosphere with oxygen through photosynthesis. The denser ozone layer of Asteria also forms in roughly the same time.
* ~605 million years ago: Existence of multicellular life on Asteria in its oceans, possibly due to an ice age.
* ~536 million years ago: "Cambrian explosion" like event on Asteria, with the first flora and fauna arriving on Asterian land and the oceans being filled with life. At this time the temperature and climate was tropical all over the moon.
* ~443 million years ago: First mass extinction on Asteria, which kills off 80% of all life on the moon. Possibly a captured asteroid impact.
* ~302 million years ago: Life recovers and flourishes all over the moon but the temperature is getting colder, possibly leading to another ice age.
* ~216 million years ago: Second ice age and mass extinction on Asteria, which kills off roughly 60% of all life.
* ~56 million years ago: Life recovers from this second ice age to its current biodiversity.
* ~ 900,000 years ago: Third ice age, which makes some species go extinct but doesn't cause a mass extinction event. Still ongoing.
* ~400,000 years ago: Earliest fossils of the Tashi dated.
* ~1123 years ago: The Tashi civilization is about as technologically advanced as modern humans during this period.
* ~Today: The Tashi civilzation are an interplanetary species that recently just achieved interstellar travel. Many Tashian colonies are set up throughout their home system.

## Climate & Geography

The climate on Asteria is similar to the climate of Earth 10,000 to 100,000 years ago. Seasons on Asteria are milder than what is experienced on Earth, since the moon's parent planet Hugha has an axial tilt of 14° and that Asteria orbits Hugha on Hugha's equatorial plane.

The geography on Asteria is very diverse. Many continents, mountains, rivers and deserts cover the moon. There are also big polar ice caps due to the recent ice age.

## Biosphere

The biosphere on Asteria is similar to the Earth's biosphere except that this biosphere is adapted to the lower gravity and atmospheric pressure that Asteria provides, meaning that the flora and fauna on Asteria are much larger, with most fauna being hexapods. Every continent on Asteria has some sort of plant life; from ordinary grass to huge forests spanning hundreds of kilometers.

### The Tashi

The Tashi are a somewhat humanoid intelligent species that evolved on Asteria during a million to 900,000 years ago. Due to the lower Asterian gravity and atmospheric pressure, the Tashi are much larger and bulkier than humans and are therefore much stronger. The Tashi are also highly intelligent, perhaps probably even more intelligent than humans. Over the years of their existence, the Tashi have developed advanced technology, becoming a type II civilization along the way, and went through three Asteria-wide wars, which led to the formation of a united Asterian government meant to conserve the ecosystems of Asteria from the spoils of war. Nowadays the Tashi have established colonies on every planet and moon in the Batt star system, with the new feat being interstellar travel.

## Pictures

(The author will add pictures since I don't have RDM lol)