An alien planet orbits a star other than our sun, and is sometimes called an "exoplanet." Learn more about the types of alien planets, including exoplanets and extrasolar planets, and get the latest news.
A project to make phone calls to the moon, an alien-life crowdfunding campaign, free live telescope feeds, and Einstein getting proven right yet again are some of Space.com's top stories of the week.
A huge, superhot alien planet likely has a stratrosphere, like Earth does, a new study reports. The find suggests that layered atmospheres may be common traits of worlds around the galaxy, researchers said.
The Red Dots Campaign, in which astronomers scan the night sky to discover planets around some of the nearest stars to Earth, has recently begun focusing in on one of the sun's closest cousins, Barnard's Star.