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Old September 26th, 2014 #1
alex revision
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Default Earth's Water is Older Than the Sun

Earth's Water is Older Than the Sun

Astronomers have discovered that much of the water on Earth—and the solar system—predates the Sun.

Not only is that an insane thing to think about, it's a breakthrough that suggests water is abundant in other planetary systems as well.

We've known for a while that the water on Earth is very old, but this latest finding suggests it's almost unfathomably old. The finding fuels speculation that the processes and materials that led to life on Earth may be a common paradigm throughout the universe.

Researchers arrived at their results by creating a detailed computer simulation of the early solar system:

"While we can't go back in time to see the the Sun and solar system at its formation," Ilsedore Cleeves, a researcher at the University of Michigan who made the discovery, told me. "The wonderful thing about the vastness of the galaxy is that we can observe many other young Sun-like stars that are currently forming or have recently formed."




An illustration of water in the solar system through time.



"By studying these astrophysical objects using high power telescopes and numerical techniques, we can use this information to model the protoplanetary disk environment in great detail," she said.

The specific variable that Cleeves and her colleagues, who published a paper on the finding in the journal Science, honed in on was 'heavy water' interstellar ice in the protoplanetary disk. Heavy water contains deuterium—a hydrogen isotope—in the place of a normal hydrogen atom.

It forms at temperatures hovering just above absolute zero, and was widespread during the birth of the solar system, judging by samples originating from that period.

"Earth's oceans, meteorites, and comets all show high levels of heavy water (HDO) to light water (H2O) as compared to the number of deuterium to hydrogen atoms in the universe," Cleeves explained. "Putting together our current knowledge of disk energetic processes, I simulated how much heavy water we'd expect to form under within the protoplanetary disk environment."

The question was whether the high deuterium levels found in those samples was "inherited" from the pre-existing environment of interstellar gas, or whether it was created by chemical reactions in the accreting protoplanetary disks.

"The short answer was that disks did not synthesize heavy water in abundance, and so could not have been the original source of our water," Cleeves said. "This work implies that much of the solar system's water ice was inherited from the original birth environment of the Sun in very dark, cold interstellar gas."

In other words, much of the water that flows on Earth is older than the planet itself, as well as its host star. Its a mindboggling notion, especially when extended to other exoplanets and stars.

Water may be inherently seeded into solar systems across the universe, and so might other essential organic compounds. Indeed, that’s where Cleeves is taking her research next.

"We will follow up this work by looking at what else may have been delivered along with the water ice," she said. "Interstellar ices are extremely chemically rich blends of many different species, with abundant carbon-bearing ices, including simple organics—it will be interesting to see what else made it into the solar system too."

Co-author and cosmochemist Conel Alexander also emphasized the astrobiological potential of discovery.

"Primitive meteorites and at least one comet contain deuterium-rich organic matter," he told me. "As with the water, there is an ongoing debate about whether the organic matter formed in the presolar molecular cloud or in the solar system. We are planning a second paper to look into this issue."

Let's hope the next paper adds even more weight to the theory that habitable conditions abound across the universe, nurturing alien biodiversity on countless other worlds.

http://motherboard.vice.com/read/ear...r-than-the-sun
 
Old September 26th, 2014 #2
Samuel Toothgold
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Earth's water arrived with asteroids. If the Earth had had no asteroids colliding into it after having cooled down to below the boiling point of water, the Earth would have remained a desert.
 
Old September 26th, 2014 #3
M.N. Dalvez
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Well, we know a lot of the elements and molecules on Earth came from other solar systems. Our sun hasn't produced any iron yet, for example, yet there's a shit-tonne of it here on Earth.
 
Old September 26th, 2014 #4
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They believe most of the heavier elements like iron, uranium, gold, etc were created in super novas. So a super nova or some other high energy stellar event is necessary for the conditions to be right for fusion to occur to create heavier elements.
 
Old September 27th, 2014 #5
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Quote:
Originally Posted by Samuel Toothgold View Post
Earth's water arrived with asteroids. If the Earth had had no asteroids colliding into it after having cooled down to below the boiling point of water, the Earth would have remained a desert.
Much of Earth's water was also brought here by comets, which are just big chunks of ice left over from the formation of the Solar System. Astronomers estimate there are billions of them in a formation called the Oort Cloud which extends around the edge of our solar system out to perhaps a light-year. Some of these comets could predate the formation of the Sun and its planets like the article suggests, which would make them very old.
 
Old September 27th, 2014 #6
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Quote:
Originally Posted by M.N. Dalvez View Post
Well, we know a lot of the elements and molecules on Earth came from other solar systems. Our sun hasn't produced any iron yet, for example, yet there's a shit-tonne of it here on Earth.
They plan on landing a vehicle on the next object predicted to come our way in a couple years. The purpose is to analize what this object is made from.

Last edited by Samuel Toothgold; September 27th, 2014 at 03:56 AM.
 
Old September 27th, 2014 #7
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Oh yeah, the Rosetta mission. And Mission Control is right there in Dortmund, isn't it?

http://www.esa.int/Our_Activities/Sp...er_12_November
 
Old September 27th, 2014 #8
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The wrong kind of mission. They should, instead, be launching other objects away from here.
 
Old September 27th, 2014 #9
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I'm not sure what you mean. Are you talking about NASA's plan to capture a small asteroid?
 
Old September 27th, 2014 #10
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No, I'm hoping to survive long enough to see a mission which will once again expell the two-legged variety of harmful foreign objects.
 
Old September 27th, 2014 #11
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Oh, something like loading all niggers and jews into a giant rocket and shooting it into the Sun? Let's hope we live long enough to see that.
 
Old May 28th, 2019 #12
T.Garrett
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Post source of the water that gives us life ...



Ambition and stubbornness, yeah ESA's Rosetta was a pretty spectacular display of that.


Cool vision of future tech in the film, and along the lines of what humanity would need to become a true space-faring race.


If NASA had produced this the 'master' would have been a negro


PS some of these sci-fi short films on the web are quite interesting.

Last edited by T.Garrett; May 28th, 2019 at 07:12 AM.
 
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