In 2017, astronomers made an unprecedented discovery: the first interstellar object ever confirmed to visit our solar system—1I/2017 U1, also known as Oumuamua. This mysterious object, unlike anything ...

Humans might not know of any intelligent beings beyond Earth, but if they exist, they might already know about us. New ...

Professor Avi Loeb, a theoretical physicist and cosmologist from Harvard University, told MailOnline why he thinks a new interstellar object is really an alien craft.

But in the past two decades, new types of black holes have been seen and astronomers are beginning to understand how they ...

The Earth might be near the center of a vast low-density void in space, which could explain one of the cosmos's greatest ...

There may be many more satellite galaxies in the Milky Way than have been observed, according to new Durham University ...

One of the main objectives of the Hubble Space Telescope, launched in 1990, was to measure the size and age of the Universe, ...

New simulations suggest that dozens of ultra-faint “ghost” galaxies may be orbiting the Milky Way, hidden from current ...

The most powerful telescope ever launched into space uncovered a cluster of forming stars within the "toe beans" of the Cat's ...

Astronomers have been given the rare opportunity to study an extrasolar object after the recent discovery of the interstellar ...

New research has revealed everything astronomers currently know about the mysterious interstellar object 3I/ATLAS.

I/ATLAS might be over 7 billion years old, a new study reports, which would make it the oldest comet known. But experts caution we need more data.