Comet Leonard, which last passed by Earth 80,000 years ago, has been dazzling the night sky before Christmas, and there's only a few days left to see the celestial object before it disappears forever.

The comet, which will come within roughly 167 million miles (270 million kilometers) of our planet, will be tracked by telescopes around the world so astronomers can pinpoint its location and make ...

The chemical signatures we're observing may reflect both the comet's ancient origins and its long journey through interstellar space. When you purchase through links on our site, we may earn an ...

An unusual comet that astronomers thought had disintegrated actually survived its close pass by the Sun in 2022 1. The comet in question, C/2021 O3, was spotted in July 2021 on its way from the Oort ...