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 Lemmon is back after 1,396 years. Astronomy enthusiasts will have the opportunity to see a comet that last visited us ...

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

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

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 ...

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

The spacecraft, bound for a metallic asteroid, turned to snap a striking image of our home planet from 180 million miles away.

How do you tell how old an astronomical object is? I mean, the next time the moon is in the sky, take a look at it. How would ...