Looking for a sky event this week? Check out our full Sky This Week column. May 21: Check in on Saturn and Mars Tonight we're ...

Ganymede is not only Jupiter's largest moon, but also the largest in our solar system and one of the few that hosts a massive ...

Jupiter’s moon Ganymede is larger than the planet Mercury, hides a massive ocean beneath ...

Ganymede, Jupiter's largest moon, is also the solar system's largest satellite, even larger than the planet Mercury. It is ...

The team still can't confidently rule out the existence of Europa's water vapor, especially as similar plumes have been more ...

Jupiter’s large moon Ganymede begins passing behind the planet in an occultation late on the 27th. It then travels through the gas giant’s long, dark shadow to finally pop back into view early on ...

Sky This Week is brought to you in part by Celestron. Friday, May 15Are you familiar with the constellation Crater the Cup?

Venus and Jupiter are the top evening features for your observing run after sunset in May. Jupiter also hosts a handful of exciting double transits - and double shadow transits - involving Europa and ...

Using nearly a decade of satellite observations, NASA's Black Marble project reveals a constantly shifting portrait of human ...

Last year, JWST made spectral observations of Ganymede and infrared observations of Io. Absorption lines of hydrogen peroxide at Ganymede's poles indicate radiolysis of water ice by charged particles ...

The two planets, being the two brightest planets in view from Earth, will also be joined by Mercury.

Looking for a sky event this week? Check out our full Sky This Week column. May 14: The Moon and Mars in the morning Jupiter ...