Now is your chance to see a comet that takes more than five years to return to Earth's cosmic neighborhood. Here's what to know about Comet 10P/Tempel 2.

A new moon tonight (July 14) may be the best time to spot Comet 10P/Tempel 2 in California as it makes its return for the ...

PARIS, France — An interstellar comet that blazed past the Sun last year could be nearly three times older than our Solar System and is unlike anything ever before seen in our cosmic backyard, ...

An interstellar comet that recently passed through the solar system may have formed as long as 12 billion years ago, making ...

A strange class of comet could explain the enigmatic behavior of ‘Oumuamua, the first known interstellar object—and even shed ...

A comet about 6 miles wide in diameter that was discovered more than 150 years ago will be observable from Earth this summer.

Based on the composition of gases spewed by the icy space rock, researchers estimate that our guest might be up to 12 billion years old—about three times the age of the solar system ...

Sometime in 2029, the European Space Agency is scheduled to launch its Comet Interceptor Mission. The Interceptor will wait for a long-period comet to arrive in the inner solar system then set off on ...

Comets have played an interesting role in the history of astronomy. Since antiquity, many cultures saw them as omens or ...

The findings surprised researchers, who used the comet's composition to better understand the environment in which it formed.

A new moon tonight (July 14) may be the best time to spot Comet 10P/Tempel 2 in Florida as it makes its return for the first ...