Most of the Earth's Water Came From Asteroids, Not From Comets

Astronomy Science ~ The mystery of the origin of water on Earth may be slightly began to unfold. Results of the investigation Rosetta space...

Astronomy Science ~ The mystery of the origin of water on Earth may be slightly began to unfold. Results of the investigation Rosetta spacecraft has proved that water on Earth did not come from a comet, as had been previously thought.

Rosetta mission that made history by sending a lander on the surface of the comet 67P, showed that the water in the comet is not like the one on our planet. Over the past few months, Rosetta examine the types of comets some scientists theorize that this object could carry water on our planet 4 billion years ago.

This vehicle found the water in comets, but the wrong kind of water - it's too heavy. Rosetta comet discovered water contains more hydrogen isotope called deuterium than the water on Earth. 'The question is who is carrying water on Earth: Are comet or something else? "said Kathrin Altwegg of the University of Bern in Switzerland, lead author of the study published in the journal Science.

Comet 67P / Churyumov-Gerasimenko
Comet 67P / Churyumov-Gerasimenko
Maybe something else that brings water to the Earth, such as an asteroid, says Altwegg. But other researchers disagree. Many scientists long been believed that the Earth has water when it was first formed, but it was boiled, so that the water on the planet is now supposed to come from an outside source.

The findings of the comet 67P / Churyumov-Gerasimenko complicate not only the question of the origin of the earth's water but our understanding of comets. Until now, scientists split the comet into two types: the near comet and far. Comets close, sometimes called Jupiter family, originally came from the Kuiper Belt beyond the orbit of Neptune and Pluto. And distant comets originating from the Oort Cloud.

In 1986, the spacecraft approaching at a distance of approximately 400 kilometers of Halley's comet, comets originating from the Oort Cloud and analyzed the water. The findings of the probe found that the water in the comet is heavier than water on Earth.

But three years ago, scientists examined the water in the comet Hartley 2, which comes from the Kuiper Belt and found the water which is very similar to Earth's water, so the comet theory was back, stronger than ever, says Altwegg.

Which is visited by Rosetta comet is a comet from the Kuiper Belt, but the water is even more severe than Halley comet, says Altwegg. It shows that comets in the Kuiper Belt not uniform as our thinking and once again complicate the problem of the origin of Earth's water.

"We might be able to eject comets from the Kuiper Belt as a potential carrier of water on Earth," he said. Astronomer Michael A'Hearn of the University of Maryland who was not part of the study, said that these results are surprising but they can not eliminate the possibility of a comet at all. Water on Earth could have come from any other kind of Kuiper Belt comets, he said. Program manager of NASA's Near Earth Object Donald Yeomans, think that the evidence could be ruled out comet.

While the asteroid is suspected that either - they may have more water around 4 billion years ago than today - the other possibility is that the Earth's original store some water in the crust or the polar ice caps, says Altwegg.

"Surprising finding may indicate the origin of Jupiter family comets are diverse, perhaps they formed at greater distances in the solar system younger than we thought before," said Kathrin Altwegg, principal investigator Rosina and lead author of the study in the journal Science this week.

Our findings also ruled out the idea that Jupiter family comets contain water that make the ocean on Earth and added that their latest models put more emphasis on the asteroid as the primary delivery mechanism for creating Earth's oceans"

Black Hole,13,Galaxy,44,Image,6,Info,149,Mission and Research,57,Nebula,21,Planets and Satellites,55,Star,39,Theory,33,
AstroNation: Most of the Earth's Water Came From Asteroids, Not From Comets
Most of the Earth's Water Came From Asteroids, Not From Comets
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS CONTENT IS PREMIUM Please share to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy