These are the top space stories this week from Space.com.
An alien planet that orbits a star other than our sun is referred to as an "exoplanet." Learn more about the types of alien planets, including exoplanets and extrasolar planets, and get the latest news.
A high school junior found a distant planet that orbits two stars, one of just a dozen such worlds known to scientists.
A tiny satellite studying alien worlds may be gone for good, but during the two years the spacecraft operated, it laid the foundation for what may become a new way of finding exoplanets.
Astronomers have spotted another possible planet orbiting Proxima Centauri, which lies just 4.2 light-years from the sun.
Astronomers have found two more potentially life-supporting alien planets in our neck of the cosmic woods, as well as a weird and record-setting 'cold Neptune.'
One of our solar system's fundamental boundaries may have existed since the very beginning, a new study reports.
When scientists search for alien planets, they get a special thrill when they find one that seems to reflect our own world back to us.
A new approach to detecting oxygen in the atmospheres of other planets may aid in the search for life beyond Earth.
Three Nobel Prize laureates gathered to talk about the universe with none other than two Expedition 61 astronauts orbiting Earth: NASA's Jessica Meir, and Italy's Luca Parmitano.
Water appears both common and unexpectedly scarce in exoplanets — many distant worlds have it, but less of it than predicted, a new study finds.
As the 2010s come to a close, it's time to revisit how some of the biggest space science stories shaped the decade.
From a world with three suns in its sky to lots of possibly habitable real estate, the past year has seen some incredible exoplanet discoveries. Here are 10 of the most memorable.
A new exoplanet mission took to the skies early this morning (Dec. 18), on a quest to better understand the metrics of distant worlds.
What do Van Gogh's "Starry Night," traditional Ethiopian coffee ceremonies and a river in Alaska have in common? All are now commemorated in the solar systems around ours.
A European exoplanet-hunting satellite is set to soar into space on Tuesday, along with a few other satellites. Here's how you can watch live.
The European launch provider Arianespace postponed the launch of a new spacecraft designed to hunt alien planets and four other satellites today (Dec 17) due to a glitch with the mission's rocket.
As finding alien worlds has gotten easier, learning every single detail scientists can has become, perhaps surprisingly, a bit of a waste of the precious time of instruments and computers alike.
Scientists have caught their best-ever look at a comet belching out ice, dust and gas — and the observations came courtesy of a mission designed to hunt for alien worlds.
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