Exoplanets

The discovery of the extraordinary exoplanet LTT 9779b was first announced a month ago.

New imagery pinpoints the spot where a baby planet is forming around the young star AB Aurigae, which lies 520 light-years from Earth.

The alleged exoplanet Fomalhaut b was discovered in 2004 and disappeared in 2014. Astronomers now say it was never a planet to begin with.

The hottest known exoplanet in the universe constantly has half of its atmosphere melted, a new study suggests

Two Earth-like exoplanets appear to have smashed into each other in a distant solar system, and the cosmic carnage is only getting worse.

The 1995 discovery showed that the sun isn't the only star to host a family of planets — something we had long figured but never demonstrated — and also that the universe is really, really weird.

Here's the reality: We're messing up the Earth and any far-out ideas of colonizing another orb when we're done with our own are wishful thinking.

This first-of-its-kind discovery reveals a new category of ultrahot exoplanet, one so thoroughly cooked that your cast-iron skillet would bubble, turn to gas and boil out of the atmosphere.

NASA's new exoplanet-hunting telescope has discovered its smallest planet yet: a world somewhere between the sizes of Earth and its smaller sister, Mars.

NASA scientists cooked up an alien atmosphere in their lab to solve the puzzle of "hot Jupiters."