The atmosphere of a brown dwarf 6.5 light-years from Earth rains molten iron and has hurricane-force winds. Here's how astronomers know that – and why that information is useful.
The discovery of geysers on Europa prove that Jupiter's icy moon is still active and almost certainly has a subsurface ocean of liquid water in which primitive life could survive.
An unlikely greenhouse gas could have absorbed enough heat to keep liquid water stable on the surface of Mars about 4 billion years ago, argue scientists in a new article.
As the hunt goes on for an Earth-like twin, NASA's Kepler mission has revealed an amazing array of planetary systems. Here are four that hint at the diversity.
NASA has stitched together 141 snapshots from its Cassini spacecraft to create a dramatic mosaic of Saturn, with Earth, Venus, and Mars appearing as tiny lights in the background.
It's possible that diamonds could stud not just the metaphorical skies touted in pop songs, but Saturn and Jupiter's skies, as well
A Christian Science perspective.
New research suggests that the collision of icy comets with our planet billions of years ago may have produced a 'cosmic factory' for early life on Earth.
NASA's Voyager 1 probe is heading toward an encounter with a distant star, about 40,000 years from now.
A thunderstorm bigger than our planet churned Saturn's atmosphere like an egg beater, reaching deep into Saturn's gassy interior and flinging water up to the ammonia-gas cloudtops.