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Latest Observable universe Stories

2008-09-24 15:00:12

Scientists using data from the U.S. space agency's Wilkinson Microwave Anisotropy Probe have identified an unexpected motion in distant galaxy clusters. National Aeronautics and Space Administration researchers say the cause of the motion might be the gravitational attraction of matter that lies beyond the observable universe. "The clusters show a small but measurable velocity that is independent of the universe's expansion and does not change as distances increase," said lead researcher...

2008-09-23 16:57:58

As if the mysteries of dark matter and dark energy weren't vexing enough, another baffling cosmic puzzle has been discovered. Patches of matter in the universe seem to be moving at very high speeds and in a uniform direction that can't be explained by any of the known gravitational forces in the observable universe. Astronomers are calling the phenomenon "dark flow." The stuff that's pulling this matter must be outside the observable universe, researchers conclude. When...

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2008-09-23 14:50:40

Using data from NASA's Wilkinson Microwave Anisotropy Probe (WMAP), scientists have identified an unexpected motion in distant galaxy clusters. The cause, they suggest, is the gravitational attraction of matter that lies beyond the observable universe. "The clusters show a small but measurable velocity that is independent of the universe's expansion and does not change as distances increase," says lead researcher Alexander Kashlinsky at NASA's Goddard Space Flight Center in Greenbelt, Md. "We...

2007-12-10 07:28:53

Cosmologists are always complaining about their inability to find the dark matter in the universe, invisible stuff that's supposedly more prevalent than regular matter. They don't even know what it is, so of course they can't see it. Meantime, a whole bunch of normal matter is missing, too. A new computer model at least suggests where some of that missing normal matter might be. Regular vs. dark Regular matter—the "visible" atoms and molecules of dirt, people, stars, gas and...

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2006-08-08 16:38:26

A critically important number that specifies the expansion rate of the Universe, the so-called Hubble constant, has been independently determined using NASA's Chandra X-ray Observatory. This new value matches recent measurements using other methods and extends their validity to greater distances, thus allowing astronomers to probe earlier epochs in the evolution of the Universe. "The reason this result is so significant is that we need the Hubble constant to tell us the size of the Universe,...

2006-03-16 15:45:00

By Deborah Zabarenko WASHINGTON -- A NASA space probe has peered back in time to a bare instant -- less than a trillionth of a trillionth of a second -- after the Big Bang, astronomers reported on Thursday. The robotic probe looked at the afterglow from the Big Bang, the energetic event scientists believe gave birth to the universe some 13.7 billion years ago, and managed to discern unprecedented detail about the earliest moments of the cosmos. "We report today the most precise measurements...

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2005-04-20 08:03:03

Cool spaces in the cosmic microwave background -- thought to be the 'birthmarks' of galaxies and clusters of galaxies -- should be bigger than recently reported, according to a new analysis of satellite data by scientists at The University of Alabama in Huntsville (UAH). This new analysis suggests that there is enough matter in the universe to bend light and other radiation as it travels through space, a finding that might deflate the current standard model of inflationary cosmology -- how...

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2005-04-06 07:50:00

RAS -- UK and US astronomers have used the Spitzer Space Telescope and the Hubble Space Telescope to detect  light coming from some of the first stars to form in some of the most distant galaxies yet seen. Speaking today at the RAS National Astronomy Meeting in Birmingham, Dr. Andrew Bunker (University of Exeter) discussed new evidence that the formation of the first galaxies may have got underway earlier than previously thought. This observational work using infrared images from...

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2005-02-24 00:45:00

PPARC -- A British-led team of astronomers have discovered an object that appears to be an invisible galaxy made almost entirely of dark matter - the first ever detected. A dark galaxy is an area in the universe containing a large amount of mass that rotates like a galaxy, but contains no stars. Without any stars to give light, it could only be found using radio telescopes. It was first seen with the University of Manchester's Lovell Telescope in Cheshire, and the sighting was confirmed with...

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2005-01-06 08:00:00

In part 2 of the interview, Astronomer Royal, Sir Martin Rees discusses the limits to our knowledge of what might have preceded the big bang. Everyone asks the question: what was 'there' the instant before everything came to be?, but the question may not go as deep as the answers it spawns. Astrobiology Magazine -- Britain's Astronomer Royal, Martin Rees, took time from his busy schedule to talk with Astrobiology Magazine's Chief Editor and Executive Producer, Helen Matsos. His three-part...


Latest Observable universe Reference Libraries

Cosmology
2014-01-12 00:00:00

Image Caption: The Hubble Extreme Deep Field (XDF) was completed in September 2012 and shows the farthest galaxies ever photographed by humans. Each speck of light in the photo is an individual galaxy, some of them as old as 13.2 billion years; the observable universe is estimated to contain more than 200 billion galaxies. Credit: NASA/Wikipedia What is Cosmology? I once commented to an acquaintance that I was fascinated by the field of Cosmology, and mused that if I had more time, I...

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