A comparison of dark comets and bright comets set against the Milky Way. On the left, a small, rocky, dark comet represents ...

Comets C/2020 F3 (NEOWISE) and C/2021 A1 (Leonard) were both wonderful objects to observe and image, with NEOWISE being one of the most impressive naked-eye comets of the 21st century.

At least eight comets will be visible in the Northern Hemisphere in 2025. Here's where and when to look and which ones you can see with the naked eye.

In 2017, astronomers found an object they’d never seen before. Now, it’s part of a growing category of elusive ‘dark comets’ – and we might find more soon.

In 2017, astronomers found an object they’d never seen before. Now, it’s part of a growing category of elusive ‘dark comets’ – and we might find more soon.

In 2017, NASA discovered and later confirmed the first interstellar object to enter our Solar System. It wasn't aliens. But artist impre ...