Social Media Sidebar

Announcement

Please sign up, comment on articles and bring your friends!

Current poll

PlanetTech is asking:

What do you think about our new web site?

Love it, indeed
Really good solution
Same as old one
The old one was better
This is a new option

Quote of the day

People say we're running out of energy. That's only true if we stick with these old 19th century technologies. We are awash in energy from sunlight.

 

Ray Kurzweil

 

Earth’s water has been present since the planet’s earliest days

RATE THIS! +26
Posted in Science on 3rd Nov, 2014 09:31 PM by AlexMuller

Studies of meteorite samples known to have come from the protoplanet Vesta indicate Earth’s surface had water much earlier than scientists previously believed. Oceans, which now cover 70 percent of the planet, were here as early as 14 million years after the solar system formed.

 
The origin of Earth’s water has long been a mystery to scientists. Many theorized the water came from icy comets and asteroids. But a new study published in the journal Science, led by Adam Sarafian of the Woods Hole Oceanographic Institution and geologist Horst Marschall, debunks that view.
 
Water present as ice in icy comets and asteroids could not have survived their impact with early Earth and would have either evaporated or been blown back into space, Marschall said. A different theory is that Earth’s water came from carbonaceous chondrites, ancient meteorites that formed with the Sun when the solar system first formed 4.6 billion years ago, predating the planets.
 
Carbonaceous chondrites contain significant amounts of water, which they could have brought to early Earth. The recent study focused on the ratio of deuterium and hydrogen, the two stable isotopes of hydrogen. These are known to be present in meteorite samples that originated from Vesta, which NASA provided. Vesta itself has been shown to have the same hydrogen isotope composition as the meteorites.

Tags: waterEarthchemistrynaturespacemeteorite

Read original article » Back to category

Comments

Author: Guest
Posted: 2014-11-04
+1
It is good to know about water on earth and when it was first present - it would help discussions about evolution of life Reply


 

Recent headlines

  • Posted in Medicine on 2017-09-24 12:24:41
    Effective help is available for migraine sufferers..read more
    Posted in Business on 2017-09-24 12:20:40
    AR startup Mira bags $1 million for Google Cardboard-like.....read more
    Posted in Medicine on 2017-09-24 12:14:44
    Alarm as 'super malaria' spreads in South East Asia..read more
    Posted in Science on 2017-09-23 08:31:24
    Fly me to the Moon: For some, lunar village takes shape..read more
    Posted in Software on 2017-09-23 08:22:48
    One year later, Microsoft AI and Research grows to 8k.....read more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in about.....read more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for commercial.....read more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 Downloads..read more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into new.....read more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs,.....read more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for commercial.....read more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short Sighted..read more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, but.....read more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in about.....read more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target mitochondria..read more

Recent Blog Posts

  • Posted by AlexMuller
    Scientists probe Neptune's depths to reveal secrets of icy.....read more
    Posted by AlexMuller
    New terahertz imaging approach could speed up skin cancer.....read more
    Posted by AlexMuller
    Rebutting the claim that antidepressants do not work..read more
    Posted by AlexMuller
    Artificial neural networks decode brain activity during.....read more
    Posted by AlexMuller
    Four Earth-sized planets detected orbiting the nearest.....read more

Login to your Account

Login to your PlanetTech Account here

Username:
Password:
Remember me
or

Create a New Account

You just need username and password

The following errors occured:
Username:
Email:
Password:
Verify password:
Remember me