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Marlow
Sport climber
OSLO
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Nov 28, 2013 - 02:42pm PT
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2014 Mercedes-Benz SLS AMG Black, a bit of Hercules history and Portland Voodoo Doughnuts...
[Click to View YouTube Video]
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Marlow
Sport climber
OSLO
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Dec 28, 2013 - 04:52am PT
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BBC Earthflight (Winged Planet) - Common Cranes Fly Over Venice (Narrated by David Tennant)
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Marlow
Sport climber
OSLO
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Hubble: Zoom Into Abell 2744 (Pandora's Cluster)
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"NASA's Hubble and Spitzer Space Telescopes are providing a new perspective on the remote universe, including new views of young and distant galaxies bursting with stars. Scientists described the findings Tuesday in a news conference sponsored by the American Astronomical Society.
The discoveries include four unusually bright galaxies as they appeared 13 billion years ago and the deepest image ever obtained of a galaxy cluster.
The ultra-bright, young galaxies, discovered using data from Hubble and Spitzer, are bursting with star-formation activity, which accounts for their brilliance. The brightest one is forming stars approximately 50 times faster than our Milky Way galaxy does today. These fledgling galaxies are only one-twentieth the size of the Milky Way, but they probably contain about 1 billion stars crammed together.
Although Hubble has previously identified galaxies at this early epoch, astronomers were surprised to find objects that are about 10 to 20 times more luminous than anything seen previously.
"These just stuck out like a sore thumb because they are far brighter than we anticipated," explained Garth Illingworth of the University of California at Santa Cruz. "There are strange things happening regardless of what these sources are. We're suddenly seeing luminous, massive galaxies quickly build up at such an early time. This was quite unexpected."
The galaxies were first detected with Hubble. Its sharp images are crucial to finding such distant galaxies and enabled the astronomers to measure their star-formation rates and sizes. Using Spitzer, the astronomers were able to estimate the stellar masses by measuring the total stellar luminosity of the galaxies."
http://www.jpl.nasa.gov/news/news.php?release=2014-007
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