When 3I/ATLAS was first spotted a few months ago, it seemed to emit a reddish color. But earlier this month, some astronomers noted it was glowing green. So why is our latest interstellar visitor ...

Heroes are usually confined to comic books and movies, but as the saying goes, we all need one. So astronomers have turned to the deep, dark cosmos to find their heroic figure — the “Hyper Extremely ...

A faint, distant object emitting X-rays may finally clarify the nature of the enigmatic “little red dots” spotted by the James Webb Space Telescope. Detected through combined data from NASA’s Chandra ...