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

Ganymede and Europa transit Jupiter tonight, while Io disappears in an occultation. West Coast observers can catch a double ...

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

On Wednesday, May 20, skywatchers looking west after dusk will be able to spot the crescent Moon glowing beside Jupiter for ...

Jupiter’s moon Ganymede is already famous for being the largest moon in the solar system. At more than 3,200 miles wide, it ...

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 ...

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

Scientists say Ganymede’s metallic heart may still be assembling beneath more than 620 miles of ice and water.

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 ...

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 ...

Artistic views of the ultraviolet aurorae on Ganymede, based on Juno’s close-up observations from 7th July 2021. As Juno flew by Ganymede at high speed, its UV spectrograph could only acquire narrow ...