While observing the Halley-type comet 12P/Pons-Brooks with ALMA and NASA's Infrared Telescope Facility, researchers ...

The discovery renews the debate about how Earth got its oceans. If comets like 12P/Pons-Brooks carried water to our young ...

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

Loeb is not dismissing the comet theory, but he argues the odds of something unusual are higher than most assume. On his ...

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

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

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

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

The work indicates that the picture of extraterrestrial water being delivered to Earth is complex. Maybe not all comets, but ...

Harvard astrophysicist Avi Loeb has cowritten a research paper speculating whether the comet 3I/ATLAS is in fact "hostile" ...

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

Mundane wayward space rock, or extraterrestrial visitor? Astronomers believe that our solar system's latest and only third ...