Our new results provide the strongest evidence yet that at least some Halley-type comets carried water with the same isotopic ...

Water found on Comet 12P/Pons-Brooks is "virtually indistinguishable" from water found on Earth. A "devil" comet's water is ...

Chemical profiling traces the source of water in one of the brightest known comets to keep returning to the Solar System.

"We should put all possibilities on the table that it's a rock, a comet, or something else until we get the evidence, the ...

A massive comet trail may have caused climate upheaval on Earth more than 12,000 years ago, sparking the Younger Dryas.

Avi Loeb said bases this hypothesis on a July 21 image captured by the Hubble Space Telescope and shared by NASA.

Comet 12P/Pons Brooks shows a D/H water ratio matching Earth’s oceans, revealed through ALMA and NASA IRTF observations.

Mankind must decide how it’s going to deal with contact with extraterrestrials — and time could be running out, one expert ...

An interstellar comet spotted by NASA is headed for our solar system, showing up near Earth later this year, but it's another ...

For centuries, people have wondered where Earth’s vast oceans came from. Our planet didn’t form with much water, yet today it ...

A recent study published in Nature Astronomy has delivered the clearest evidence yet that some comets carried Earth-like ...

Comet 67P's water has the same molecular signature as Earth's oceans, suggesting it may have contributed to Earth's water supply.