Scientists found a mysterious cosmic object that's between 10 and 100 times more powerful than all known supernovas. What could it be?

Massive interstellar object 3I/ATLAS, larger than Manhattan, shows unusual glow pattern and planetary alignment that Harvard physicist calls potentially technological.

Interstellar object 3I/ATLAS — which is zooming through our inner solar system — appears to be emitting its own light, according to Harvard astrophysicist Avi Loeb. The observation by L… ...

Harvard's Avi Loeb shares that a Manhattan-sized interstellar object, 31/ATLAS, is approaching Earth.

NASA's James Webb Space Telescope has spotted a tiny moon orbiting Uranus, expanding the number of the planet's known satellites to 29.

Viewers spotted a mystery object that appeared in the sky over Connecticut on Tuesday night.

A senior Harvard astronomer has reignited speculation about the origins of a vast interstellar object hurtling through the solar system. He has suggested that it might be an engineered probe ...

A respected Harvard astrophysicist has shared new claims about the mysterious interstellar object in our Solar System, saying there are signs it is not an ordinary comet.

Scientists have proposed a six-word message to send to the interstellar object shooting through space before it reaches a point they claim would be ideal for a covert approach on Earth.

Mankind must decide how it’s going to deal with contact with extraterrestrials — and time could be running out, one expert warned — after he sounded the alarm that an incoming int… ...

Imagine looking up at the night sky and spotting a huge, mysterious interstellar object racing through space, coming from far beyond our solar system. It is moving fast, and it seems to be heading ...