Is a sun a star or a planet? While science now agrees the sun is a star, new telescopes may soon challenge how we define ...

What's the best way to reveal what an exoplanet is made of? Wait for it to get gravitationally shredded and engulfed by its ...

In a striking new view from space, the European Space Agency's Solar Orbiter has given scientists their first close-up ...

Researchers rarely get a glimpse of an interstellar object up close like 3I-ATLAS, so they have jumped on the opportunity to learn about its composition, which can reveal how planet systems are made.

Comet 3I/ATLAS, which made a close approach to the sun, has prompted lots of public interest. Kim Kardashian asked NASA's ...

A comet known as 3I/ATLAS made news in July when it was confirmed to have originated outside Earth's solar system. One infamous theory even posited that the interstellar interloper, estimated to be ...

An interstellar comet that originated outside our solar system just made its closest pass of the sun, setting it on an ...