K2-18b, an exoplanet 120 light-years away, may be the best hope to confirm that life exists beyond Earth. Here's what to know ...

Large hailstones made of ammonia may explain why the gas is missing from large pockets of Jupiter's atmosphere.

The weather gets a little wild and weird on Jupiter. How wild? Spacecraft instruments have measured strong winds, tracked ...

A molecule detected on a planet 124 light-years away is produced on Earth by decaying phytoplankton and other microbes. There is no other known source.

These conditions classify the exoplanet as being in what astronomers ... the parched landscapes of Mars or the icy crust of the jovian moon Europa); 2. SETI, experiments designed to detect radio ...

Such transits dim the starlight ever so slightly, which is how many exoplanets have been discovered ... will be a multiyear mission to study the Jovian moon, believed to have a subsurface ocean ...

Researchers have developed a new coronagraph that could make it possible to see distant exoplanets obscured by light from their parent stars. Researchers have developed a new coronagraph -- an ...