PLATO powered up and extended its solar panels as the exoplanet-hunting spacecraft readies for launch as soon as December.

TRAPPIST-1, a planetary system 40 light years from Earth, could host a planet with an atmosphere and liquid water, but astronomers can’t be certain just yet.

Much like the murky waters of the deep ocean, the unpredictable fluidity of Earth’s atmosphere can distort any light that ...

NASA launched an exoplanet-hunting experiment Oct. 1 despite the government shutdown. After the mission's end on Oct. 2, news ...

Exoplanet TRAPPIST-1 e may contain an atmosphere and liquid water, NASA scientists said. Research into the exoplanet is ongoing.

Astronomers have discovered an alien world that defies every planetary rule with its massive size, low density, and tilted ...

Space scientists look back on three decades of exoplanet discoveries—from rows of massive ‘super-Earths‘ to worlds with ...

NASA officials respond to reports claiming an exoplanet-hunting balloon crashed in Texas, with the project’s lead scientist explaining what really happened.

Exoplanets are planets outside Earth's solar system. In 1995, a gas giant named 51 Pegasi b, which orbits a star similar to Earth's sun, etched its name in history as the first exoplanet ever ...

A low-density, puffy planet orbiting relatively far from a young star in a nearly perpendicular orbit. What's going on?