So far, astronomers have spotted only three interstellar visitors: 1I/‘Oumuamua in 2017, 2I/Borisov in 2019, and 3I/ATLAS in ...

Harvard astrophysicist Avi Loeb proposes that interstellar object 3I/ATLAS could be made of antimatter—"the most efficient fuel"—while NASA scientists remain sceptical.

I/Atlas, the third interstellar comet, sparks science and speculation, NASA data vs Avi Loeb’s questions, alleged ’signals’, and why it isn’t an alien threat.

In about 5 billion years, our Sun will run out of hydrogen fuel and collapse into a dense, Earth-sized remnant called a white dwarf. Though it will no longer shine as it once did, this stellar core ...

A massive comet known as 3I/ATLAS that was first discovered zooming across the solar system over the summer showed signs of ...

An interstellar comet that originated outside our solar system just made its closest pass of the sun, setting it on an outgoing path — but it’s not leaving our cosmic ...

A team of astronomers used the James Webb Space Telescope to create the first 3D atmospheric map of an exoplanet. The fiery WASP-18b, a massive “ultra-hot Jupiter,” revealed striking temperature ...

Using the James Webb Space Telescope, astronomers have captured the clearest picture yet of how galaxies formed in the early universe.

If it is a galaxy, it would be the oldest known galaxy in the cosmos, but it could also be a brown dwarf or an early black hole.

The James Webb Space Telescope has captured imagery of spiral galaxy NGC 7469, which is 90,000 light-years in diameter. The ...

Avi Loeb criticizes NASA for not releasing key images and for classifying 3I/ATLAS as a comet without conclusive evidence ...