Asteroids; Most of Earth's Water Came from Asteroids, Not Comets. News. By Charles Q. Choi published 10 December 2014 When you purchase through links on our site, we may earn an affiliate commission.

Earth’s water may not have originated from asteroids after all. Scientists have long questioned whether an early Earth could have contained the appropriate hydrogen and oxygen on its own to ...

Asteroids are the obvious alternative, and today they are the consensus favorite for where most of Earth's water came from. Like comets, asteroids are also pieces of small planetesimals from which ...

How Earth got its water remains one of science’s enduring mysteries. The new results support the idea that asteroids brought water to the young planet ( SN: 5/6/15 ).

INCOMING Water vapor can be trapped in glass and melted rocks that are created by an asteroid impact.The finding boosts the idea that asteroids brought water to the early Earth. ratpack223/iStockphoto ...

I think water on Earth came from 4 main sources .. asteroids, comets, ice / snow, and steam from internal sources like steam vents. Steam and ice / snow may be the greatest factor. FYI ..

Icy comets may have a reputation for being the inner solar system’s ancient water delivery system, but a new study finds that most of the water in our nearest neighbor, the moon, was actually ...

Asteroids, not comets, may have delivered most of Earth's water to the planet when the solar system was young, new data from a probe orbiting a comet suggests.

He added that the research shows that “water abundance on Earth is not a freak accident; it’s what was expected.” But Shober points out that asteroids or comets could have still played an ...