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 ...

It is a cosmic enigma that has left astronomers scratching their heads: a mysterious object, hurtling into our solar system ...

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

The waning moon shines close to the king of the planets on Dec. 7. Don't miss Jupiter shining close to the waning gibbous ...

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Eight distant worlds hold secrets that still puzzle scientists and spark endless curiosity. Each moon offers a strange allure ...

The Last Quarter Moon phase is scheduled for October 12 at 2:13 P.M. EDT. On October 12 at 6 P.M. EDT, the Moon will pass 4° north of Jupiter, with Jupiter exhibiting a magnitude of –2.2. Telescopic ...

Witness the celestial spectacle of Jupiter shining brightly near the waning gibbous moon in the Gemini constellation on ...