Usually, comets are dormant blocks of rock and ice. They only wake up when they get close to a star. The intense heat causes ...

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

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

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

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

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

A new comet should be visible to the naked eye this week, but you're going to need to set an alarm to see it.

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

Could “alien water” be hiding in 3I/ATLAS? Harvard researcher Avi Loeb explains the discovery and how it could challenge current theories. Iran responds to Trump's threat of blowing up the whole ...

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

If C/2026 A1 (MAPS) survives its close encounter with the sun, it could blaze brightly enough to be seen from Earth. A blue-green glow surrounds comet C/2026 A1 (MAPS) on March 14. The comet is now ...