Solar System

An unstable group of asteroids orbiting near Venus could threaten Earth — but not for a few thousand years

Scientists believe a moon of Uranus may have once had a subsurface ocean.

Two centuries after its completion, the Erie canal is celebrated from space, with NASA satellite imagery showing the engineering feat of this structure.

NASA has reported possible biosignatures in a Mars rock, but delays and funding woes cloud its sample return mission. Could China's Tianwen-3 step in and deliver samples from the site itself?

Lunar samples reveal the far side of the moon, hidden from Earth's view, may have a cooler interior than the near side.

Mining the moon for helium-3: How real is the prospect, and is there a business case for such an undertaking?

Despite being just outside Tucson, Arizona, Biosphere 2 looks almost like a colony on another planet.

Ancient iron-metabolizing microbes may have turned toxic oxygen into an energy source.

Scientists have proposed a new explanation for Venus' giant, crown-shaped geological features, known as coronae.