The solar system lost its ninth planet back when Pluto was demoted to a dwarf planet, but research might indicate that there ...

The anomalous nature of the object led astrophysicist Avi Loeb to apply a thought experiment to it, highlighting everything about it that might align with a hypothetical alien spacecraft.

NPR's Ari Shapiro talks with astronomer David Jewitt about what we can learn from the third interstellar object to have entered our solar system, a comet-like object known as 3I/ATLAS.

Our sun, currently in its prime, is expected to shine for another 5 billion years. Eventually, it will transform into a red giant, potentially engulfing inner planets. Afterward, it will become a ...

The sun has become more and more active over the last 16 years, in a turn that surprised scientists and could affect space ...

I/ATLAS is a fast, ancient interstellar object. Its odd features fuel both scientific study and speculation. On July 1, astronomers detected a strange, fast-moving object racing toward the Sun. Named ...

Tom Zega, a University of Arizona scientist who's worked on samples brought back from the asteroid Bennu, tells The Show more ...

Astronomers worldwide are tracking 3I/ATLAS, the third confirmed interstellar object, currently traversing our solar system.

Three missions aimed at observing space weather are set to launch Sept. 23 from Florida. Here's what to know about NASA's ...

The coldest planet in the Solar System is Uranus, which is surprisingly colder than Neptune due to its unique internal heat ...