A mysterious visitor from another star system is carrying secrets billions of years old. Its composition could reveal how ...

Comet 41P/Tuttle-Giacobini-Kresak has begun acting a little unusually, but there are likely natural explanations before we go ...

I thought about the interstellar visitor as my daughter, wife, and I took turns dragging his wandering monster truck balloon ...

The comet has been on our radars since the summer of 2025, when the Asteroid Terrestrial-impact Last Alert System (ATLAS) ...

Missing US scientists’ mystery: Harvard astrophysicist Avi Loeb urges caution regarding a series of unexplained deaths and ...

The interstellar comet 3I/ATLAS releases water equivalent to 70 Olympic pools daily, providing insights into ancient ...

Add Yahoo as a preferred source to see more of our stories on Google. Could “alien water” be hiding in 3I/ATLAS? Harvard researcher Avi Loeb explains the discovery and how it could challenge current ...

If C/2026 A1 (MAPS) survives its close encounter with the sun, it could blaze brightly enough to be seen from Earth.

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.

Comet C/2025 R3 (PanSTARRS) is brightening as it approaches Earth and should be visible to the naked eye between April 13 and ...