If there was a contest for the most interesting moon in our solar system, Callisto would be a contender. Jupiter's ...

For decades, astronomers have classified exoplanets into neat categories: rocky Earth-like planets, gas giants like Jupiter, ...

"Scientifically there's a huge amount we can learn from asteroids," says Alan Fitzsimmons, an astronomer at Queens University ...

Barnard's Star is a small, dim star of the type that astronomers call red dwarfs. Consequently, even though it is one of the ...

Astronomers have made an exciting breakthrough by discovering four sub-Earth exoplanets orbiting Barnard’s Star, our closest ...

Nuclear pulse propulsion is a technology that would work. It was being developed in the 1960s but it was stopped because of ...

Callisto, Jupiter's second-largest moon, may have a rocky surface with an ocean beneath the surface.

The planets are all too hot for life as we know it, but astronomers haven’t given up searching for more planets in Barnard's ...

Dec. 9, 2024 — A NASA Hubble Space Telescope observation program called OPAL (Outer Planet Atmospheres Legacy) obtains long-term baseline observations of Jupiter, Saturn, Uranus, and Neptune in ...