Our understanding of the true nature of the cosmos relies on measurements of its expansion, but cosmologists have been ...

"A bit like dinosaurs on Earth — they were enormous and primitive. And they had short lives, living for just a quarter of a ...

Is it a flying elephant? A gingerbread man? When I was little, I used to search the clouds for amusing shapes as they drifted across the sky and imagine stories about their patterns. Now I'm a ...

Interstellar object 3I/ATLAS is making its closest approach to Earth in just over a week from now, coming within 167 million ...

Researchers have identified a distinctive ultraviolet signature of water in the interstellar comet known as 3I/ATLAS.

Astronomers using the James Webb Space Telescope have discovered a bizarre-looking exoplanet that defies explanation ...

Smooth filaments stretching for many light-years, seen by the powerful space telescope, could indicate what the right "recipe ...

In a glimpse of the early universe, astronomers have observed a galaxy as it appeared just 800 million years after the Big ...

An odd star brightened for more than 70 days in 5 B.C.E., according to a Chinese text. The object may have been a comet that ...

Since its discovery, some people have speculated that interstellar visitor 3I/ATLAS could be alien technology. Harvard ...

On December 19, avid skywatchers can catch a glimpse of the mysterious visitor through powerful binoculars or a telescope ...

Scientists using NASA’s James Webb Space Telescope have observed an entirely new type of exoplanet whose atmospheric ...