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Hubble Finds Source of Magellanic Stream
Scientific Computing ^ | Thursday, September 19, 2013 | unattributed

Posted on 09/21/2013 10:32:43 AM PDT by SunkenCiv

Astronomers using NASA's Hubble Space Telescope have solved a 40-year mystery on the origin of the Magellanic Stream, a long ribbon of gas stretching nearly halfway around our Milky Way galaxy.

The Large and Small Magellanic Clouds, two dwarf galaxies orbiting the Milky Way, are at the head of the gaseous stream. Since the stream's discovery by radio telescopes in the early 1970s, astronomers have wondered whether the gas comes from one or both of the satellite galaxies. New Hubble observations reveal most of the gas was stripped from the Small Magellanic Cloud about two billion years ago, and a second region of the stream originated more recently from the Large Magellanic Cloud.

A team of astronomers, led by Andrew J. Fox of the Space Telescope Science Institute in Baltimore, MD, determined the source of the gas filament by using Hubble's Cosmic Origins Spectrograph to measure the amount of heavy elements, such as oxygen and sulfur, at six locations along the Magellanic Stream. They observed faraway quasars, the brilliant cores of active galaxies that emit light that passes through the stream. They detected the heavy elements from the way the elements absorb ultraviolet light.

Fox's team found a low amount of oxygen and sulfur along most of the stream, matching the levels in the Small Magellanic Cloud about two billion years ago, when the gaseous ribbon is thought to have formed. In a surprising twist, the team discovered a much higher level of sulfur in a region of the stream that is closer to the Magellanic Clouds.

(Excerpt) Read more at scientificcomputing.com ...


TOPICS: Astronomy; Science
KEYWORDS: haltonarp; hst; hubble; magellaniccloud; magellanicstream; stringtheory
Courtesy of NASA

Courtesy of NASA

1 posted on 09/21/2013 10:32:43 AM PDT by SunkenCiv
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To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...

Astronomy Picture of the Day — The Magellanic Stream
NASA | August 15, 2013 | (see photo credit)
Posted on Fri Aug 16 07:07:16 2013 by SunkenCiv
http://www.freerepublic.com/focus/chat/3055369/posts


2 posted on 09/21/2013 10:33:11 AM PDT by SunkenCiv (It's no coincidence that some "conservatives" echo the hard left.)
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To: null and void; 6SJ7; AdmSmith; AFPhys; Arkinsaw; allmost; aristotleman; autumnraine; ...

Thanks null and void.

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3 posted on 09/21/2013 10:34:01 AM PDT by SunkenCiv (It's no coincidence that some "conservatives" echo the hard left.)
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To: SunkenCiv
I take it you or somebody has a reason to believe that gas would ever just sort of sit around in one place in the vacuum of space????????????

Those kinds of things are plasma phenomena, and not gas.

4 posted on 09/21/2013 10:36:47 AM PDT by varmintman
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To: varmintman
Even deep space it is NOT a vacuum. Partial pressures rule
5 posted on 09/21/2013 10:49:59 AM PDT by Nifster
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To: Nifster

Not enough or remotely close to enough to contain gas in one place.


6 posted on 09/21/2013 10:51:08 AM PDT by varmintman
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To: varmintman

Plasma is gas.


7 posted on 09/21/2013 10:53:05 AM PDT by Kirkwood (Zombie Hunter)
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To: SunkenCiv

Pink Slime takes Over The Earth! :-)


8 posted on 09/21/2013 11:05:49 AM PDT by left that other site (You Shall Know the Truth, and the Truth Shall Set You Free...John 8:32)
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To: SunkenCiv

Well, if it dates back 2 billion years, that means Ferdinand Magellan is off the hook, but they don’t define what they mean by “more recently” so George W. Bush may be to blame for that.


9 posted on 09/21/2013 11:06:16 AM PDT by Verginius Rufus
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To: Kirkwood

Noppers..

http://en.wikipedia.org/wiki/Plasma_%28physics%29


10 posted on 09/21/2013 11:10:15 AM PDT by Conan the Librarian (The Best in Life is to crush my enemies, see them driven before me, and the Dewey Decimal System)
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To: varmintman

There are clouds of gas throughout space. Where do you think it’s going to go?


11 posted on 09/21/2013 11:11:20 AM PDT by LibWhacker
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To: SunkenCiv

Sulfur.

They discovered the location of H*ll. Now they know where Obama is from.


12 posted on 09/21/2013 11:25:01 AM PDT by Hardraade (http://junipersec.wordpress.com (Obama: the bearded lady of the Muslim Brotherhood))
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To: SunkenCiv
and they STILL want to defund Hubble... feh
13 posted on 09/21/2013 11:33:17 AM PDT by Chode (Stand UP and Be Counted, or line up and be numbered - *DTOM* -vvv- NO Pity for the LAZY)
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To: SunkenCiv
...the Magellanic Stream, a long ribbon of gas stretching nearly halfway around our Milky Way galaxy.

Obviously it's a greenhouse gas causing cosmic warming. The EPA should get involved and regulate the universe into entropy ;-)

14 posted on 09/21/2013 11:54:03 AM PDT by DakotaGator (Weep for the lost Republic! And keep your powder dry!!)
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To: LibWhacker

http://www.thefreedictionary.com/dissipate


15 posted on 09/21/2013 1:09:14 PM PDT by varmintman
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To: Kirkwood

Plasma is a fourth state of matter.


16 posted on 09/21/2013 1:10:30 PM PDT by varmintman
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To: varmintman
http://dictionary.reference.com/browse/gravity?s=t
17 posted on 09/21/2013 1:35:36 PM PDT by LibWhacker
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To: Chode

As long as they defund it after they get the Webb Space Telescope in orbit.
http://www.jwst.nasa.gov/
http://en.wikipedia.org/wiki/James_Webb_Space_Telescope


18 posted on 09/21/2013 9:25:48 PM PDT by Jack Hydrazine (I’m not a Republican, I'm a Conservative! Pubbies haven't been conservative since before T.R.)
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To: Jack Hydrazine
yeah, but they've wanted to let it die for years, and it's still making fools of them
19 posted on 09/22/2013 5:16:31 AM PDT by Chode (Stand UP and Be Counted, or line up and be numbered - *DTOM* -vvv- NO Pity for the LAZY)
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