For generations, artists and science-fiction writers have imagined alien landscapes beneath twin sunsets. The image became iconic in popular culture long before astronomers confirmed that planets ...

Around 40 light years away from Earth, hidden in the constellation Pisces, there is a small alien world that has captured the attention of scientists around the world. Known as Gliese 12 b, this ...

Confirmation of alien life would answer one enormous question and immediately create dozens more. Humanity’s reaction would ...

Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

There is no chance in hell our species will be able to reach another Earth-like planet in the Universe in the foreseeable future, so the only way we can get a sense of the habitability of such places ...

A rocky world orbiting within its star’s habitable zone may be surrounded by a helium-rich atmosphere, providing the strongest evidence yet that planets with Earth-like conditions could support life ...

If you keep up with where the next SpaceX or Blue Origin rocket is headed, you are probably familiar with NASA’s Double Asteroid Redirection Test, a project to determine if a rocket launched from ...

Life in helium atmospheres on exoplanets? When searching for possible signs of alien life on exoplanets, scientists tend to focus on atmospheres that might be earthlike. That is, atmospheres dominated ...

The newly discovered exoplanets, designated as GJ 9827 b, c and d, are located fairly close to their host star, completing orbits within 6.2 days. ESO A nearby 'super‑Earth' just 25 light years from ...