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

Astronomer Gianluca Masi and his Virtual Telescope Project will host a special livestream on Oct. 24 beginning at 1:30 p.m.

A rare encounter of two comets this week will have stargazers in awe after nearly a year of no easily seen comets.

A rare green comet known as C/2025 A6 (Lemmon) passes Earth for the first time in over 1,300 years, National Geographic said.

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

The cosmic snowball, made up of frozen gases, dust and rock, is hurling past Earth at around 135,000 mph. Its orbital period ...

This long-duration comet will make its closest approach to Earth this fall, before disappearing into the outer solar system ...

Comets Lemmon and SWAN are soaring past Earth in a rare cosmic treat. Here's best viewing times, tips and more in ...

Comet Lemmon is being called the 'best and brightest' comet of the year with its distict green color, and it's not the only ...

Comet Lemmon's nucleus is believed to be just a couple of miles in diameter. This is relatively small compared to other ...

This week's night sky will include a new comet that hasn't flown past Earth in over a thousand years -- and it won't be ...

Short-period comets get close to the sun much more often than their long-period kin, and every time they do, they deplete ...