One of the big surprises: Despite the moon's cooled crust, the data shows Io maintains liquid hot lava just below the ground.

And later this year in August, four planets — Mercury, Venus, Jupiter and Saturn — will become visible. The phenomenon accompanies other April treats for astrophiles. This week, the Lyrid ...

Inferring planet composition from observations of clouds Gas giants like Jupiter and Saturn and ice giants like Neptune and Uranus are a major focus of current space missions and large telescopes ...

A celestial leap is set to take place over two nights as the moon and Jupiter will appear to dance ... astral phenomenon as the moon, Venus and Saturn put a smile on the night sky.

Jupiter and Mars are on display during May evenings ... Planetary action moves to the morning, with the appearance of Venus and Saturn climbing high in the predawn sky. Venus is obvious and ...

Gas giants like Jupiter and Saturn and ice giants like Neptune and Uranus are a major focus of current space missions and large telescopes, including the James Webb Space Telescope, in part ...

NASA's Juno spacecraft has provided new insight into Jupiter and its volcanic moon, Io. Credit: NASA / JPL-Caltech / SwRI / MSSS / Alain Mirón Velázquez At Jupiter's north pole, powerful storms ...

Jupiter has been a gleaming gem in the night ... Now two months past its conjunction with the sun back in March, Saturn is emerging from the dawn glow. On May 1, Saturn rises by 4:30 a.m. or ...