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Spotting Distant Galaxy Clusters With WISE
2012-12-07 05:33:49

April Flowers for redOrbit.com - Your Universe Online As grand and colorful as it is, our solar system is a fleck in the grander cosmos. Our Milky Way galaxy has hundreds of billions of solar systems, yet it is only just a drop in the sea of galaxies. Galaxy clusters, the rarest and largest of galaxy groupings, can be the hardest to find, which is where NASA's Wide-field Infrared Survey Explorer (WISE) becomes helpful. So far, the mission's all-sky infrared maps have revealed one...

First Stars Born Short 750 Million Years After The Big Bang
2012-12-06 12:30:42

April Flowers for redOrbit.com - Your Universe Online The universe has had traces of heavy elements such as carbon and oxygen as far back in time as astronomers have been able to see. Elements such as these were originally churned from the explosion of massive stars. They formed the building blocks for planetary bodies, and eventually for life on Earth. Peering back far in time, a research team from MIT, Caltech, and the University of California at San Diego (UCSD) found matter...

Scientists Offer New Insights Into Early Universe
2012-11-29 15:54:22

Lee Rannals for redOrbit.com — Your Universe Online Penn State University scientists using techniques from modern physics have developed a new understanding of the earliest eras in the history of the universe. The scientists now have an extended analyses that include quantum physics farther back in time than ever before, heading back to the very beginning. The new paradigm of loop quantum origins show that the large-scale structures we see in the universe evolved from...

Galaxy Clusters Offer Insight On Dark Matter
2012-11-21 09:56:07

April Flowers for redOrbit.com - Your Universe Online Dark Energy is one of the major puzzles of modern astronomy, and one tool that astronomers use to understand this force is encoded in the distribution of clusters of galaxies. A new study by a team of astronomers, led by Dr. Jeeseon Song at the University of Michigan, has yielded exquisitely precise distances of a large sample of clusters. These precise distances may lead to breakthroughs in understanding the expansion history of our...

Near Infrared Technology Lets Astronomers Study Numerous Galaxies At The Same Time
2012-10-10 10:23:23

April Flowers for redOrbit.com - Your Universe Online Some 24 robotic arms attached to a new high tech instrument have been transported from Edinburgh, Scotland to a Chilean mountaintop in the hope that some of the key questions surrounding the beginnings of the Universe will be answered in greater detail than ever before. The European Southern Observatory (ESO) has provisionally accepted KMOS after testing was completed at the UK Astronomy Technology Centre (UK ATC) in Edinburgh....

2012-10-04 14:44:37

The winners of a contest that encourages scientists and students across the globe to explore fundamental, big questions in astronomy and cosmology will present their proposals and essays in a joint conference Oct. 12-13 at the Franklin Institute in Philadelphia. The New Frontiers in Astronomy & Cosmology International Grant and Essay Competition, led by Donald G. York, the Horace B. Horton Professor in Astronomy & Astrophysics at the University of Chicago, will award more than $4...

Hubble Reveals Deepest View  Ever Of The Universe
2012-09-26 05:09:28

April Flowers for redOrbit.com - Your Universe Online Researchers using the Hubble Telescope have assembled a new and improved portrait of our deepest-ever view of the Universe. The eXtreme Deep Field (XDF) photo was compiled by combining ten years worth of NASA and ESA Hubble Space Telescope observations taken of a patch of sky within the original Hubble Ultra Deep Field. The Hubble Ultra Deep Field is a small area of space in the Fornax (The Furnace) constellation created using Hubble...

Artificial Intelligence Maps The Universe
2012-09-24 11:48:59

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have developed an algorithm that is able to chart and explain accurately the structure and dynamics of the universe. The team developed a new algorithm based on artificial intelligence which provides results that are close to the observed distribution of motion and galaxies. It has been hard for astronomers to explain the distribution of galaxies. Five percent of the universe is made of normal matter, making up the...

Spitzer And Hubble Telescopes Discover Furthest Galaxy Ever
2012-09-19 19:01:35

Lee Rannals for redOrbit.com — Your Universe Online A long time ago, in a galaxy far, far away, light took off, then traveled 13.2 billion light-years until it was finally picked up by NASA's telescopes. Astronomers have identified the furthest galaxy ever using NASA's Spitzer and Hubble space telescopes. The light captured by the telescope was from when the universe was just 500 million years old, according to NASA. "This galaxy is the most distant object we have ever...


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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
sough
  • A murmuring sound; a rushing or whistling sound, like that of the wind; a deep sigh.
  • A gentle breeze; a waft; a breath.
  • Any rumor that engages general attention.
  • A cant or whining mode of speaking, especially in preaching or praying; the chant or recitative characteristic of the old Presbyterians in Scotland.
  • To make a rushing, whistling, or sighing sound; emit a hollow murmur; murmur or sigh like the wind.
  • To breathe in or as in sleep.
  • To utter in a whining or monotonous tone.
According to the OED, from the 16th century, this word is 'almost exclusively Scots and northern dialect until adopted in general literary use in the 19th.'
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