Test your knowledge on all things science with our weekly, free crossword puzzle! If you enjoyed this, see how quickly you ...

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

On October 3, Comet 3I/ATLAS will be almost 29 million kilometers (18.006 million miles) from Mars. The European Space Agency ...

Astronomers have observed a planet that in some ways behaves more like a star — including a massive growth spurt unlike anything witnessed before in a free-floating planet.

At the time, astronomer Jerry Ehman spotted the highly unusual outburst in printed out records, annotating the major radio ...

While there is no reason to panic, please be aware that a visitor born near a star other than our Sun is currently passing through our Solar System. This alien visitor has been wandering through space ...

Bizarre NASA discoveries that we’re not allowed to talk about (but we will) Space exploration consistently reveals phenomena ...

Asteroid ‘Families’ Reveal Hidden Histories and Impact Risks across the Solar System ...

The methane gas may constitute a rarefied atmosphere, or it may come from erupting plumes on Makemake’s surface.

Our solar system just got another guest from the galaxy. Find out how scientists spotted this third interstellar object, what they’re learning about it, and why it might be our best chance yet to ...