Harvard's Avi Loeb gives a '40% chance' that interstellar object 3I/ATLAS is alien technology, citing 'anomalies' like pure ...

NASA’s Hubble and Chandra telescopes reveal Betelgeuse’s hidden companion, “Betelbuddy,” reshaping what we know about binary ...

The James Webb Space Telescope has captured imagery of spiral galaxy NGC 2283, which is located about 45 million light-years ...

Pan across the James Webb Space Telescope's view of the Cosmic Cliffs, "a region at the edge of a gigantic, gaseous cavity ...

A UCLA-led team has achieved the sharpest-ever view of a distant star’s disk using a groundbreaking photonic lantern device ...

Over the past seven decades, thousands of sophisticated spacecraft have been launched on ambitious missions to look down on ...

Comets Lemmon and SWAN are nearing Earth in a rare double cosmic treat. Where and what time can you see them? What to know.

Three billion years ago, a sun -like star reached the end of its life, throwing off its outer layers following its red giant ...

Avi Loeb suggested that if 3I/ATLAS is a spacecraft, it may use its proximity to the Sun's powerful gravitational pull while ...

"If the object is an alien spacecraft slowing down, and the anti-tail is braking thrust, then this change from anti-tail to ...

Comet Lemmon can be seen in the northwestern sky near the bright star Arcturus. Skywatchers should use the Big Dipper to ...

Quasi-moons are not real moons and don't actually orbit the Earth, although they sometimes appear to do so for short periods of time, Phil Nicholson, professor of astronomy at Cornell University, told ...