The interstellar comet 3I/ATLAS has started to brighten and dim in a remarkably steady rhythm, repeating every 16.16 hours as ...

A simple breakdown of the new 3I/ATLAS pulsing discovery and why scientists are checking if Callisto might be affected.

Callisto, Jupiter's second-largest moon, may have a rocky surface with an ocean beneath the surface. If there was a contest for the most interesting moon in our solar system, Callisto would be a ...

Next week, Europe will fly its first mission to the Jupiter system to explore the gas giant and three of its intriguing moons. This "means that we have seen the spacecraft for the last time ever," ESA ...

NASA’s Juno spacecraft has successfully found and characterised the auroral “footprints” of Jupiter’s moon Callisto for the first time. This discovery completes the “family portrait” of auroral ...

Born in Leeds, Joe finished his Spanish degree in 2018 before becoming an English teacher to football (soccer) players and managers, as well as collaborating with various football media outlets in ...

Gorgeous images of stellar nurseries are featured this week alongside some of the solar system's moons: Mars's Deimos, ...

Jupiter, the giant of our Solar System, hosts nearly 100 moons. Discover some of Jupiter moons with unique characteristics to explore.

Callisto is the fourth and final of the Galilean satellites. (We hope you enjoyed our tour of the four Galilean moons of Jupiter!) Callisto is nearly the same size as Mercury by diameter, but with ...

Callisto's shadow will follow along Jupiter's south-south temperate belt from 9:09 p.m. to 12:54 a.m. tonight Feb. 22-23, 2014. A smaller telescope magnifying around 60x or higher will show it. Credit ...

Jupiter shines brilliantly in the eastern sky this December as it nears opposition early in 2026, outshining nearby stars and ...

Differences in the number and speed of cometary impacts onto Jupiter's large moons Ganymede and Callisto some 3.8 billion years ago can explain their vastly different surfaces and interior states, ...