Astronomers from the Harvard-Smithsonian Center for Astrophysics (CfA) and elsewhere report the discovery of a new brown ...

A recently discovered observatory may be the oldest in the Americas, challenging everything we knew about ancient astronomy.

When the 3 rd -century Christian theologian Origen of Alexandria attempted to account for the unusual movements of the Star ...

The discovery of a hidden supermassive black hole inside an ancient galaxy suggests that some of our universe's most extreme objects could be invisible unless observed in infrared wavelengths, James ...

The ancient Greeks we admire today regarded these seven men as the wisest of their time. They attributed to them not only the ...

For the first time, scientists have mapped vast, continent-scale river drainage systems on Mars — ancient networks that may ...

High on a hill in Turkey, the world’s oldest temple may hide a cosmic secret. Did its builders align their pillars with ...

The interstellar comet 3I/ATLAS is making its closest approach to Earth on Dec. 19. Learn about the 'reconnaissance mission' ...

Astronomers are closing in on a result so statistically secure that, in their language, it borders on certainty: a 99.9999999 ...

It seems the AI hype has turned into an AI bubble. There have been many bubbles before, from the Tulip mania of the 17th ...

Interstellar comet 3I/ATLAS is turning green and getting brighter as it nears Earth. Scientists track the ancient space rock, ...

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 ...