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 ...

After decades of searching, astronomers may have finally stumbled upon the first moon known to exist beyond our solar ...

Almost all planets in our solar system have moons – why not exoplanets? Astronomers believe they have discovered the first ...

"There's one we haven't found — a planet just like ours. At least, not yet." It might sound hard to believe, but NASA's exoplanet count just reached 6,000 — and that's with only about 30 years of ...

Astronomers usually don't like clouds. After all, clouds obscure their view of the cosmos. But dense cloud coverage is now something astronomers might look for on distant exoplanets. Researchers at ...