At the far edge of the Solar System, where the Sun’s influence thins into the dark between the stars, a pair of aging ...

Kuiper Belt clues, competing ideas, and how Rubin Observatory could finally reveal the hidden world soon by 2026.

Astronomers are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously ...

Hubble images from December 2025 show interstellar object 3I/ATLAS releasing two narrow jets of material as it moves away from the Sun, raising questions about rotation and activity ...

Some or all of the mortgage lenders featured on our site are advertising partners of NerdWallet, but this does not influence our evaluations, lender star ratings or the order in which lenders are ...

For only the second time ever, a collision between two asteroids has been observed around an alien star not too far beyond ...

On this list, you'll find some weird incidents on Earth, a bit of Russian space drama and, of course, that little ...

Hubble reveals a mysterious 'controlled' jet system on 3I/ATLAS. Is this 130,000mph interstellar visitor a natural comet or ...

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

3I/ATLAS, Humanity — and the MAVEN Anomaly: A Challenge for NASA and ESA. On Friday, December 19, the interstellar object ...

It came from outer space. Interstellar space, to be precise. From somewhere beyond the influence of our sun, possibly from ...

The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space telescopes and orbiters have been documenting the rare visit. A mysterious ...