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64b07f88bfcf63e79006e4c15c88f513
2011-07-26 10:15:00

An Australian PhD student has created the most accurate measurements for determining how fast the Universe is expanding. Florian Beutler, a PhD candidate with the International Center for Radio Astronomy Research (ICRAR) at the University of Western Australia, has calculated how fast the Universe is growing by measuring the Hubble constant. "The Hubble constant is a key number in astronomy because it's used to calculate the size and age of the Universe," Beutler said in a statement. As the...

1e1346b5c389d9a55c9c394d5fb7d191
2011-07-14 07:32:42

Simulations improve characterization of cosmology's "Ëœstandard ruler' Ohio State University researchers are leveraging powerful supercomputers to investigate one of the key observational probes of "dark energy," the mysterious energy form that is causing the expansion of the universe to accelerate over time. The OSU project, led by Chris Orban, a graduate research fellow in physics at Ohio State's Center for Cosmology and Astro-Particle Physics, focuses on simulations created on...

2011-07-06 13:30:00

SILVER SPRING, Md., July 6, 2011 /PRNewswire/ --There is no more all-encompassing source of mystery than the universe. Since the dawn of humanity, its vastness has elicited endless wonder and questions that have consumed mankind's intellect and imagination. This summer, SCIENCE welcomes back Professor Brian Cox, the physicist whom the Los Angeles Times affectionately calls "the nerd who is cooler than you," for the four-part series WONDERS OF THE UNIVERSE. Expanding on the promise of...

1d8d93c7713a9f1fce15e2f902cd7b4c
2011-06-29 12:45:00

Scientists said on Wednesday that they have discovered the most distant quasar to date, thriving at a time when the Universe was less than 800 million years old. The object is around 100 million years younger than the previously known most distant quasar.  Prior to its discovery, the most distant quasar was about 870 million years old.  The scientists said the newly discovered object was around when the Universe was about 770 million years old, which is only five percent of its...

f40c33ca09bf329e40ad3e3a36618008
2011-05-26 11:45:00

If you have stayed up nights wondering about the shape of electrons, you can now sleep easier. Electrons have been found to be almost, but not quite, perfectly round, The Telegraph reports. Researchers at Imperial College London have recently measuremed the shape of the electron, finding that it is almost a perfect sphere, in a study published in the journal Nature. The decade-long experiment suggests that the electron differs from being perfectly round by less than...

278c4ef404895903e145e69670afb644
2011-05-25 10:47:53

Early results from dramatically upgraded telescope show breadth of scientific impact A new and uniquely powerful tool for cutting-edge science is emerging on the crisp, high desert of western New Mexico. Outwardly, it looks much the same as the famed Very Large Array (VLA), a radio telescope that has spent more than three decades on the frontiers of astronomical research. The 27 white, 230-ton dish antennas still peer skyward, the 72 miles of railroad track still wait to transport the...

0db528136a181ced8cbd39fbaa86fed7
2011-05-23 13:30:00

Stanford University astrophysicist Risa Wechsler andother researchers have found that only four percent of galaxies are similar to the Milky Way galaxy. The team compared the Milky Way to similar galaxies in terms of luminosity and distance to other bright galaxies.  They found that galaxies with two satellites that are as bright and close by as the Milk Way's two closest satellites, the Large and Small Magellanic Clouds, are hard to come by. According to a press release by the...

2011-05-19 10:08:00

WASHINGTON, May 19, 2011 /PRNewswire-USNewswire/ -- A five-year survey of 200,000 galaxies, stretching back seven billion years in cosmic time, has led to one of the best independent confirmations that dark energy is driving our universe apart at accelerating speeds. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) The survey used data from NASA's space-based Galaxy Evolution Explorer and the Anglo-Australian Telescope on Siding Spring Mountain in Australia. The findings...

8b3ed6fd6db0c1009873b6ebcc8adeeb
2011-05-19 11:55:00

According to NASA, dark energy is driving our universe apart at an accelerated rate. Scientists performed a five-year survey of 200,000 galaxies to help add more evidence to the favored theory of how dark energy works.  This theory says dark energy works as a constant force, uniformly affecting the universe and propelling its runaway expansion.  "The action of dark energy is as if you threw a ball up in the air, and it kept speeding upward into the sky faster and faster," Chris...

7bab79f721330c9b762d755781e80942
2011-05-03 06:30:00

Berkeley Lab-led BOSS proves it can do the job with quasars The biggest 3-D map of the distant universe ever made, using light from 14,000 quasars "“ supermassive black holes at the centers of galaxies billions of light years away "“ has been constructed by scientists with the third Sloan Digital Sky Survey (SDSS-III). The map is the first major result from the Baryon Oscillation Spectroscopic Survey (BOSS), SDSS-III's largest survey, whose principal investigator is David Schlegel...


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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...

8_2c71772f2c3a31994d5208d4518632495
2004-10-19 04:45:44

Large-Scale Structure of the Cosmos -- Stars are organised into galaxies which in turn appear to form clusters and superclusters, separated by voids. Prior to 1989 it was commonly assumed that the superclusters were the largest structures in existence, and that they were distributed more-or-less uniformly throughout the universe in every direction. However, in 1989, Margaret Geller and John Huchra discovered the "Great Wall", a sheet of galaxies more than 500 million light years long...

8_67ff07d77c86523b0eab2955b9ab43e02
2004-10-19 04:45:44

Cosmology -- area of science that aims at a comprehensive theory of the structure and evolution of the entire physical universe. Modern Cosmological Theories Present models of the universe hold two fundamental premises: the cosmological principle and the dominant role of gravitation. Derived by Hubble, the cosmological principle holds that if a large enough sample of galaxies is considered, the universe looks the same from all positions and in all directions in space. The second point...

6_c01dfaf162273609e19b80ea97407cf52
2004-10-19 04:45:42

Redshift -- Redshift is the phenomenon that the frequency of light when observed, under certain circumstances, can be lower than the frequency of light when it was emitted at the source. This usually occurs when the source moves away from the observer, as in the Doppler effect. More specifically, the term redshift is used for the observation that the spectrum of light emitted by distant galaxies is shifted to lower frequencies (towards the red end of the spectrum, hence the name) when...

6_0ba47eab12382e6a4e2cc12b1c7ddf782
2004-10-19 04:45:42

Quasar -- A quasar (from quasi-stellar radio source) is an astronomical object that looks like a star in optical telescopes (i.e. it is a point source), but has a very high redshift. The general consensus is that this high redshift is cosmological, the result of Hubble's law and that their redshift indicates that they are typically very distant from Earth; we observe them as they were several billions of years ago. Since we can see them despite their distance, they must emit more...

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Word of the Day
bellycheer
  • Good cheer; viands.
  • To revel; to feast.
The word 'bellycheer' may come from 'belle cheer', "good cheer".
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