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This photo of Saturn's moon Dione crossing the planet is simply jaw-dropping

How would the world change if we found alien life?

Rare doomed planet with extreme seasons discovered

'Mirage planets' may complicate search for extraterrestrial life

Doomed white dwarf stars to spawn supernova in colossal crash

Wow! Hubble telescope sees rare 3-Moon shadow dance on Jupiter

Scientists: What it would be like to enter a black hole

Hubble Space Telescope could survive through 2020, scientists say

Some earthlike alien planets may begin as 'mini-Neptunes'

Found! 5 ancient alien planets nearly as old as the universe