Salsotto

Salsotto is a ruined and abandoned planet devoid of life, mentioned several times in Honkai: Star Rail.
==Description==
Due to its vast seas of sand, Planet Salsotto was said to have shined in the most dazzling shade of gold, with its giant meteorite craters clearly visible. This was due to the impact caused by the Meteoric Starfall relentlessly hitting the planet at such a particular angle which caused the planet's rotation to gradually come to a halt. This caused Salsotto's days and nights to last half a year each, causing daytime to be scorching hot and nights to be extremely cold. The Salsottians boarded two floating mobile cities, one of which was named Tumbleweed, which had to move constantly along the terminator line between dawn and dusk in order to survive. Salsottians developed winged suits and many became skyfishers, where they would hunt the phlogiston jellyfish for their livelihood, as it was an essential component to the Phase Flame that powered and moved the city. Skyfishers had to take care to not get attacked by giant birds though.
==Culture==
The pursuit of "Tumbleweed" was not only for survival but also for a dignified life. When it moved faster than the terminator line, then the early morning light would march into the afternoon; when slower than the terminator line, then the dusk light would fade into the late night. In this way, the naturally optimistic Salsottian managed to restore every day to its original state. The romance in their bloodline blessed them with the easygoing spirit to sing leisurely in peaceful afternoons and sleep soundly on starry nights.
In the morning, skyfishers departed from the port and dove right for the sand, where they would hunt the phlogiston jellyfish. They would only return to the city after dusk. By the power of mysterious creatures, the city barely managed to voyage ahead. Even though their entire survival relied squarely on those two fragile wings, the Salsottians were optimistic by nature and would never let the heavy burden of fate lower their spirit or bend their spine. They would find time to spend with their family playing glass musical instruments, with such an attitude that it was almost as if they could carve the musical notes right into the glass. They also enjoyed making pen pals and would often place their written messages in the Dandelion Letterbox, meant for the moving city on the other end of the terminator line.
It was no easy feat for Salsotto's skyfishers to entrap and hunt phlogiston jellyfish that flew out of the sand. During turbulent flights, the seemingly tender and soft safety harness was the thread of life for a skyfisher. Hunting phlogiston jellyfish was never easy. From trick moves to intense chasing, from precise blocking to the final capturing act, one wrong move in any one of these links in the chain could mean mortal danger. It was customary for a young skyfisher to get one strand of hair from each parent and weave them into the harness with metal supports, while a married one should get one from their spouse. In this manner, the harness would be blessed by the power of "home" and ensure that the skyfisher always returned safely. In this cruel world where all fought hard for survival, "home" was the only place that could offer comfort and support for a skyfisher.
Hunting phlogiston jellyfish was a long survival game for skyfishers from Salsotto. Legs, being far from the heart, can only maintain their temperature when tightly strapped in fluffy feather puttees. Only at the end of the long and highly stressful hunt would an exhausted skyfisher begin to feel pain and fatigue. For those unprepared, it would be too late to discover their partial necrosis caused by severe frostbite. Therefore, skyfishers would check if they had tightened their puttees many times before taking off. After all, they wouldn't get another chance to do so in high-speed flight. They knew what the wind would take away as they stepped into the sky. Traces of lime powder and aluminum powder were found in the metal shell embedded in the puttee, which seemed to be a means of emergency heating.
If any skyfishers died from exhaustion or were attacked by giant birds, Salsottians would spare no effort in bringing back their remains and would bury their winged suits and eagle helmets with them in the dark land. According to the traditional Salsottian rituals, "landing" equals death and is a symbol of eternal rest. The flight must never stop, just like how the city must never stop moving. Only the most skilled, respected, and reliable skyfisher captains would receive a Soaring Ring. They blew their fishing whistles in the sky and seamlessly coordinated with one another, like they were the most sharp-eyed hunting eagles. For the duration of each flight, each team member was lonely and vulnerable. All they could rely on were the 124 types of whistles that could be performed by their team captain. Hence, there had long been a saying in Salsotto: "Skyfishers entrusted one-third of their lives to the rigorously developed technology, one-third to their ingeniously refined equipment, and one-third to their reliable lead skyfisher captain."
==History==
===Past===
At some point in the past, waves upon waves of strange meteorites ceaselessly fell onto Planet Salsotto. The long-lasting impact caused by the Meteoric Starfall relentlessly hitting the planet at such a particular angle caused the planet's rotation to gradually come to a halt. Salsotto's days and nights became longer and longer, until every sunrise and sunset would last for a seeming eternity, and the whole planet's rotation was finally brought to a standstill. The day night cycle lasted for half a year each, causing daytime to be scorching hot and nights to be extremely cold. This was why the Salsottian people, barely surviving at the time, boarded two floating mobile cities and began their chase with dawn and dusk, moving along Salsotto's Terminator line, which was the Salsottians' lifeline for habitability.
However, this voyage of tenacity and perseverance would, at last, come to its final downfall. Gradually, the planet's magnetic field weakened and the atmosphere thinned and years later, the two moving cities that had never met each other would fought against each other in an unknown conflict, with their respective turrets among the wreckage still aimed in opposition. One of the two cities must have crossed half of the planet to the other one and started the initial incursion. Traces of brutal warfare between the two cities were still occasionally discernible under the sand dunes, which together, became practically the same ruins. Ever since a certain unknown time, the duration of each of its rotation cycles had somehow gradually decreased, but the ruins of the once mobile city still lie silently on the planet, no longer following the ever-shifting terminator line.
===Recent===
Many years ago, Himeko and Pom-Pom received a mission from Herta to seek out Cadence Glass, a material found on Salsotto. When they arrived before the planet, they found a shipwrecked vessel containing Welt and Void Archives. The two were rescued and decided to join the Astral Express Crew to repay the debt.Open World Dialogue, Parlor Car, Himeko: After defeating Cocolia (When did you and Mr. Yang meet?)Himeko: Many years ago, Pom-Pom and I were tasked by Herta to go to the abandoned and ruined world of Salsotto, looking for a special material called Cadence Glass...
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