Cell to Singularity Wiki

Callisto is the 14th Celestial Body and the 5th Moon obtained in The Beyond Bubble Universe, which can generate Stardust.

In-Game Description[]

"Callisto, the fourth Galilean moon, has a heavily cratered surface. It is the only one of the Galilean moons not exposed to high levels of radiation, making it a possible candidate for future human settlement."



  • Heavy Cratering (Speed):

"At 4.5 billion years old, Callisto is one of the most ancient objects in the solar system. It has borne the burnt of many impacts from other celestial bodies over its lifetime. The surface of this moon is almost entirely covered in craters."

  • Low Radiation (Payout):

"Callisto's distance from Jupiter means that it receives less radiation than the other Jovian moons. Its orbit outside of Jupiter's radiation belt could make it safer for human exploration than many other moons in this system."


  • Natural Satellites (Payout):

"Moons are defined by their orbit around larger celestial bodies. Most moons revolve around a planet, but smaller bodies can have moons, too - even particularly large asteroids."


  • Speed of Light (Speed):

"The speed of light is the rate at which light and all massless particles travel through a vacuum. While it can seen instantaneous from up close, over long distances this speed limit becomes very noticeable. The theory of relativity relates to the speed of light."

  • Cosmic Gravity (Payout):

"Gravity is one of the fundamental forces and key to understanding how the universe works. Using Newton's principles, astronomers can explain how stars and planets form, predict their mass and motion, and infer the existence of dark matter."

  • Goldilocks Zone (Discount):

"The Goldilocks Zone, also called the Habitable Zone, is the region around a star with conditions necessary for a planet that can sustain life. Planets like Earth, with surface water and breathable atmospheres, might be found in these zones in other systems."

Host Planet[]

Callisto's planetary host is Jupiter.


  • Going to Valhalla (Rank 5):

"Callisto is famous for its heavily cratered surface. The largest of these is a multi-ringed basin called Valhalla, which is more than 1,800 km wide. This huge crater was the result of an impact that may have happened four billion years ago."

  • Binary Sunset (Rank 8):

"Some scientists think that if Jupiter had continued to grow during its formation, it might have started nuclear fusion and become a star. This would have turned our solar system into a binary system, and Jupiter's moons into planets."

Real Image[]