Latest Gravitational lensing Stories

When Galaxy Clusters Collide
2012-01-10 15:18:03

A UC Davis graduate student who is leading a study of the collision of galaxy clusters 5 billion light years away discussed the team´s findings today, Jan. 10, in a press briefing at the annual meeting of the American Astronomical Society in Austin, Texas. “A galaxy cluster is like a little universe, because it has the same matter composition as the whole universe,” said William Dawson, a Ph.D. candidate in physics. “By studying this little universe, we can learn...

Image 1 - Low-mass Star Detected In Globular Cluster
2011-12-16 04:21:18

Even the most powerful high-tech telescopes are barely able to record remote low-mass and thus faint stars. Together with researchers from Poland and Chile, an astrophysicist from the University of Zurich has now detected a low-mass star in globular cluster M22 for the first time through microlensing. The result indicates that the overall mass of globular clusters might well be explained without enigmatic dark matter. Until now, it was merely assumed that low-mass and therefore extremely...

Black Hole Imaged Gobbling Up Accretion Disc
2011-11-04 09:59:30

[ Watch the Video ] A team of scientists has used the NASA/ESA Hubble Space Telescope to observe a quasar accretion disc – a brightly glowing disc of matter that is slowly being sucked into its galaxy´s central black hole. Their study makes use of a novel technique that uses gravitational lensing to give an immense boost to the power of the telescope. The incredible precision of the method has allowed astronomers to directly measure the disc´s size and plot the temperature...

Dark Matter Census From Hubble Survey
2011-10-13 10:31:56

[ Watch Video 1 ] | [ Watch Video 2 ] The NASA/ESA Hubble Space Telescope has been used to make an image of galaxy cluster MACS J1206.2-0847. The apparently distorted shapes of distant galaxies in the background is caused by an invisible substance called dark matter, whose gravity bends and distorts their light rays. MACS 1206 has been observed as part of a new survey of galaxy clusters using Hubble. Cluster MACS J1206.2-0847 (or MACS 1206 for short) is one of the first targets in a...

2011-06-29 07:57:42

Gravitational Lensing by Clusters of Galaxies Yet another independent line of evidence points to the dominance of dark matter in galaxy clusters. According to Einstein's theory of general relativity, space is curved in the vicinity of strong gravitational fields. One consequence of the warping of space by gravity is that the path of light from background galaxies is bent when it passes near a cluster, in much the same way that a glass lens will bend light. The images of the galaxies are...

2011-05-18 12:00:00

WASHINGTON, May 18, 2011 /PRNewswire-USNewswire/ -- Astronomers, including a NASA-funded team member, have discovered a new class of Jupiter-sized planets floating alone in the dark of space, away from the light of a star. The team believes these lone worlds probably were ejected from developing planetary systems. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) The discovery is based on a joint Japan-New Zealand survey that scanned the center of the Milky Way galaxy during...

2011-01-12 13:49:33

Astronomers who survey galaxies in the distant universe are getting some unexpected help from gravity, according to a new study. In a presentation at the American Astronomical Society meeting this week and a related paper in the current issue of the journal Nature, researchers say that as many as 20 percent of the most distant galaxies currently detected appear brighter than they actually are, because of an effect called "strong gravitational lensing." The discovery could change astronomers'...

2010-12-06 13:45:00

Cosmologists have come up with a new way to solve their problems. They are inviting scientists, including those from totally unrelated fields, to participate in a grand competition. The idea is to spur outside interest in one of cosmology's trickiest problems -- measuring the invisible dark matter and dark energy that permeate our universe. The results will help in the development of new space missions, designed to answer fundamental questions about the history and fate of our universe....

2010-11-11 12:50:00

Astronomers using NASA's Hubble Space Telescope took advantage of a giant cosmic magnifying glass to create one of the sharpest and most detailed maps of dark matter in the universe. Dark matter is an invisible and unknown substance that makes up the bulk of the universe's mass. The new dark matter observations may yield new insights into the role of dark energy in the universe's early formative years. The result suggests that galaxy clusters may have formed earlier than expected, before the...

2010-08-19 14:52:35

Astronomers have devised a new method for measuring perhaps the greatest puzzle of our universe "” dark energy. This mysterious force, discovered in 1998, is pushing our universe apart at ever-increasing speeds.For the first time, astronomers using NASA's Hubble Space Telescope were able to take advantage of a giant magnifying lens in space "” a massive cluster of galaxies "” to narrow in on the nature of dark energy. Their calculations, when combined with data from other...

Latest Gravitational lensing Reference Libraries

2010-09-13 16:46:47

The cluster CL0024+17, located in Pisces, is a galaxy cluster that is allowing astronomers to probe the distribution of dark matter in space. Dark matter does not reflect light and therefore cannot be seen. It is only detectable by the way its gravity affects the lights around it. Using gravitational lensing astronomers observe the distorted light around the dark matter and are able to tell where it is located within a cluster. A dark matter ring found near the cluster's center, by...

2004-10-19 04:45:41

Gravitational Lens -- A gravitational lens is formed when the light from a very distant, bright object (such as a quasar) is "bent" around a massive object (such as a massive galaxy) between the bright object and the viewer. The process is known as gravitational lensing, and was one of the predictions made by Einstein's general relativity. Description In a gravitational lens, the gravity from the massive object bends light as a lens might. As a result, the path of the light from a...

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Word of the Day
  • The offense of persistently instigating lawsuits, typically groundless ones.
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This word ultimately comes from the Old French word 'barater,' to cheat.