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[Y] New 3-D map of the Universe is best one yet

post #1 of 34
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http://news.yahoo.com/s/space/201105...seisbestoneyet

Quote:
BOSTON — Astronomers have created the most complete 3-D map of our local universe, revealing new details about our place in the cosmos.

The map shows all visible structures out to about 380 million light-years, which includes about 45,000 of our neighboring galaxies (the diameter of the Milky Way is about 100,000 light-years across). [See the new 3-D universe map image.]

"I think it speaks to our desire to understand our place in the universe," said Karen Masters of the University of Portsmouth in England, during a press conference today. "I wouldn’t be happy if we didn't have a complete map of the Earth. It's nice to have a complete map of where we live."

The map was assembled using data from the Two-Micron All-Sky Survey (2MASS) Redshift Survey (2MRS), which took 10 years to scan the complete night sky in near-infrared light. The survey used two ground-based telescopes, the Fred Lawrence Whipple Observatory on Mt. Hopkins, Ariz., and the Cerro Tololo Inter-American Observatory in Chile.

Near-infrared light, which is of a longer wavelength than visible light, can penetrate the opaque clouds of dust common in galaxies. This allowed the 2MRS survey to extend its "eyes" closer to the plane of the Milky Way galaxy than has been possible in previous studies, because that area is heavily obscured by dust.

"This covers 95 percent of the sky," Masters said. "In the infrared, we're less affected by the gunk in the milky way so we're able to see down closer to the plane of the galaxy."

The 3-D aspect of the map comes from the fact that researchers measured the cosmic objects' redshift, which denotes how much its light has been shifted toward the red end of the color spectrum. This happens because of the so-called Doppler effect, which causes the wavelength of light to be stretched when the light's source is moving away from us.
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post #2 of 34
Super cool dude, thanks!
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post #3 of 34
not sure if repost...


OT: amazing!!!!!!!!
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post #4 of 34
I wonder why the "equator" or the middle horizontal line, is mostly dark. Man astronomy fascinates me.
    
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post #5 of 34
Quote:
Originally Posted by lkegley9 View Post
I wonder why the "equator" or the middle horizontal line, is mostly dark. Man astronomy fascinates me.
I would guess that's the plane our galaxy lies on. We can't see much through it because of all the stars and dust in our own galaxy.
post #6 of 34
Coolio I suppose. Now lets get some better tech, gogo!!!

Quote:
Originally Posted by mott555 View Post
I would guess that's the plane our galaxy lies on. We can't see much through it because of all the stars and dust in our own galaxy.
Yep... lol
post #7 of 34
Quote:
Originally Posted by mott555 View Post
I would guess that's the plane our galaxy lies on. We can't see much through it because of all the stars and dust in our own galaxy.
Correct
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post #8 of 34
Where is the "You are here" mark? lol
    
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post #9 of 34
Quote:
Originally Posted by Genjimaru View Post
Where is the "You are here" mark? lol
Where is the food court? lol
post #10 of 34
Incredible. Even looking at this image, our minds still can't fathom the vastness of the universe.
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