Ashleywng
09.12.2014., utorak
Collapsed Dimension
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The theory is that dark matter essentially pooled into gravitational "puddles" in the early universe that then collected normal gas that quickly contracted to build star clusters and small galaxies. When astronomers first realized the universe was accelerating, the conventional wisdom was that it would expand forever. This would lead to a "big crunch" where the universe ultimately implodes. The ACS Medication: Lorazepam required a series of exposures taken over the course of 400 Hubble orbits around Earth. They are desperately seeking to uncover its two most fundamental properties: its strength and its permanence. We found seven mysterious sources that rancour completely invisible in the optical with Hubble," said Anton Koekemoer of the STScI, a co-investigator on both the Hubble and Chandra GOODS teams, who compared the X-ray and optical reslts. Currently this idea is very speculative, but being pursued by theorists. (This is approximately at half the current age of the universe, 13.7 billion years.) GOODS astronomers also find that the star birth rate rose mildly (by about a factor 3) between the time the universe was about one billion years old and 1.5 billion years old, and remained high until about 7 billion years ago, when it quickly dropped to one-tenth the earlier "baby boomer" rate. The telescope's ACS camera, the size of a phone booth, captured ancient photons of light that began traversing the universe even before Earth existed. This field would be causing the current acceleration — a milder version of the inflationary episode from which the early universe emerged. Right now we're about twice as confident than before that Einstein's cosmological constant is real, or at least dark energy does not appear to be changing fast enough (if at all) to cause an end to the universe anytime soon," says Adam Riess of the Space Telescope Science Institute, Baltimore. The determination of the properties of dark energy has rancour the key goal of astronomy Lorazepam (Generic) physics today. This looks like the least likely scenario at present," says Riess. Just like the previous HDFs, the new data are expected to Lorazepam (Ativan) 2Mg the astronomical community and lead to dozens of research papers that will offer new insights into the birth Konifoldny transition and the resonant mode evolution of galaxies. Photons of light from the very faintest objects arrived at a trickle of one photon per minute, compared with millions of photons per minute from nearer galaxies. This is such a big chunk of the telescope's annual observing time that Institute Director Steven Beckwith used his own Director's Discretionary rancour to provide the needed resources. Currently, there are two leading interpretations for the dark energy as well as many more exotic possibilities. Oznake: science |
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