What's special about Chiron's rings is that they're still forming; this marks the first time astronomers have ever seen a ...

Harvard researcher Avi Loeb says comet 3I/ATLAS weighs 33 billion tons and spans 3.1 miles, making it far larger than ...

Webb just spotted a carbon-rich moon factory 625 light-years away, revealing how moons like ours may have first taken shape.

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

The James Webb Telescope captures the beginning of planetary formation around the young star HOPS-315 for the first time.

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

The interstellar object hurtling toward the inner solar system, where Earth is located, is much larger than previously ...

From lava worlds to gas giants, NASA says the variety of these worlds is staggering—and that signs of a further 8,000 distant ...

A newly tracked interstellar comet, which has been dubbed 3I/ATLAS and is likely to pass the sun, Jupiter, Mars and Venus ...

The Sun's formation caused temperature differences in the surrounding disk of gas and dust. Inner, hotter regions formed rocky planets from less volatile elements. Outer, colder regions allowed ...