A dune field on Mars, as seen by the Mars Reconnaissance Orbiter.

Planets orbiting stars beyond the solar system come in all shapes and sizes but mostly fit into a few categories: large and hot gas giants, super-Earths that are slightly larger than our planet, ...

Humans have been searching the stars for alien radio signals for decades — and so far, E.T. has not phoned home. But that doesn’t mean intelligent life isn’t out there, a new study hints. Rather, ...

While long-fabled technologies like Smell-O-Vision are still a long way off from ever being a reality, astronomers can still technically smell stuff deep in space without actually having to get a ...

When/if alien life ever cruises toward Earth in big spaceships, we’re probably not just going to see it; we’re going to hear it via narrow radio signals. If an extraterrestrial civilization wanted to ...

Investor excitement around the SpaceX IPO is colliding with peak Elon Musk futurism after a new social media post featuring his musings about light-speed travel and exploring alien worlds. In a social ...

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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 ...

The picture-perfect launch of NASA’s Roman Space Telescope could push forward the space agency’s ultimate search for life ...

Time works differently in space and on other planets, so the decade-plus that Alien Isolation fans have been waiting for the sequel might have felt like a blink of an eye on a different world. On ...