Facts about Jupiter's moon Callisto, the third largest moon in the Solar System and the most heavily-cratered object.

NASA chief Jared Isaacman’s call to restore Pluto’s planetary status has reignited a long-running scientific debate over whether the icy world was unfairly demoted from the solar system’s official ...

The New Horizons spacecraft sends back its sensational snapshots of Jupiter, and its volcanic moon Io, before the mission's close encounter with Pluto (Photo by: Photo12/Universal Images Group via ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Scientists have just discovered a rare interstellar object hurtling ...

Alien probes could already be hiding somewhere in our Solar System – and our current surveys are nowhere near good enough to ...

A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet, the object is only the third celestial ...

Viewed from orbit, Jackass Flats — situated in southern Nevada about 65 miles northwest of Las Vegas — could easily be confused for Mars. The alluvial basin is full of tan and gray regolith, hued ...

The space agency's planetary science analysis groups must pause while NASA checks if they comply with Trump's orders. When you purchase through links on our site, we may earn an affiliate commission.

Suggested Citation: "1 Introduction." National Academies of Sciences, Engineering, and Medicine. 2025. Proposed Science Themes for NASA's Fifth New Frontiers Mission. Washington, DC: The National ...

"We found that some comets in the inner Oort cloud form a long-lasting spiral structure." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Spirals ...

Using a new technique that partly relies on artificial intelligence, researchers spotted potentially more than 10,000 new exoplanets.

On April 7, Uranus passed in front of a distant star located 400 light-years away, giving NASA scientists a rare cosmic alignment in which to investigate the distant ice giant. During the hour-long ...