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

An interstellar comet changed its chemistry after passing the Sun, revealing hidden layers and a surprising mix of carbon ...

Comet 41P/Tuttle-Giacobini-Kresak has begun acting a little unusually, but there are likely natural explanations before we go for the "is it aliens" routine.

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

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) telescope in Río Hurtado, Chile, spotted it for the first time. It was ...

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

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.

Scientists have detected a possible ultra-fast pulsar spinning every 8.19 milliseconds near the Milky Way’s central black hole. If confirmed, this rare object could act as a precise cosmic clock, ...

A comet named 3I/ATLAS was first discovered on July 1, 2025, and is located about 420 million miles away from Earth, ...