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Last updated on April 25, 2014 at 1:22 EDT
Brightening Star Offers Astronomers New Way To Study Binary

Brightening Star Offers Astronomers New Way To Study Binary Systems

Brett Smith for redOrbit.com - Your Universe Online Researchers searching for planets orbiting around a distant star look for a signature dimming of that star’s light, but what if the distant star suddenly gets a bit brighter? Astronomers...

Latest Gravitational lensing Stories

exomoon candidate
2014-04-10 12:05:00

Whitney Clavin, NASA Jet Propulsion Laboratory Titan, Europa, Io and Phobos are just a few members of our solar system's pantheon of moons. Are there are other moons out there, orbiting planets beyond our sun? NASA-funded researchers have spotted the first signs of an "exomoon," and though they say it's impossible to confirm its presence, the finding is a tantalizing first step toward locating others. The discovery was made by watching a chance encounter of objects in our galaxy, which...

2014-04-03 16:20:14

WASHINGTON, April 3, 2014 /PRNewswire-USNewswire/ -- NASA's Hubble Space Telescope has weighed the largest known galaxy cluster in the distant universe, catalogued as ACT-CL J0102-4915, and found it definitely lives up to its nickname -- El Gordo (Spanish for "the fat one"). http://photos.prnewswire.com/prnvar/20081007/38461LOGO By measuring how much the cluster's gravity warps images of galaxies in the distant background, a team of astronomers has calculated the cluster's mass to...

pandora cluster
2014-01-08 03:49:10

redOrbit Staff & Wire Reports - Your Universe Online Abell 2744, a giant galaxy cluster believed to have formed when four smaller galaxy clusters crashed into one another, is the subject of the first image captured by Hubble's Frontier Fields observational program, NASA and ESA announced Tuesday. Abell 2744, which was first observed by the Hubble Space Telescope in 2011, is also known as Pandora’s Cluster because the mixture of elliptical and colorful spiral galaxies that formed...

2014-01-07 16:20:22

WASHINGTON, Jan. 7, 2014 /PRNewswire-USNewswire/ -- NASA's Hubble Space Telescope is providing a new perspective on the remote universe, including new views of young and distant galaxies bursting with stars. Scientists described the findings Tuesday in a news conference sponsored by the American Astronomical Society (AAS). (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) Highlighted in the briefing were three discoveries -- four unusually bright galaxies as they...

Non-Astronomy Scientists May Help Answer Cosmology Conundrum
2013-11-28 06:41:07

April Flowers for redOrbit.com - Your Universe Online Measuring the invisible and intangible is a challenge for sure, but scientists have made inroads on one front: the study of dark matter and dark energy, two of the most mysterious substances in the cosmos. Although dark matter is intermixed with normal matter, it gives off no light, making it impossible to see. Dark energy presents even more challenges, yet researchers believe it works against gravity to pull our universe apart at...

Hubble, Spitzer And Chandra Team Up For Frontier Fields Mission
2013-10-25 04:05:45

[ Watch the Video: Getting A Deeper Look At The Universe ] redOrbit Staff & Wire Reports - Your Universe Online In an ambitious new project, NASA officials are looking to combine three of the agency’s most powerful space telescopes in what is being called the deepest probe of the universe ever attempted. The mission, which has been dubbed “The Frontier Fields,” will feature the Hubble, Spitzer and Chandra space telescopes and is scheduled to last over the next three years....

Astronomers Use Gravitational Lensing To Weigh Most Distant Galaxy
2013-10-17 14:57:54

Lee Rannals for redOrbit.com - Your Universe Online Using a gravitational lensing technique, astronomers were able to weigh one of the most distant galaxies in the universe. Gravitational lensing is a technique used by astronomers that was first predicted by Albert Einstein's theory of relativity. As light from a very distant object moves through the universe, it can essentially be intensified by another object that is closer to Earth, reviving the light and making it possible for...

Dark Matter Evidence From Galaxy Cluster Abell 1689
2013-09-13 03:56:51

[ Watch the Video: Pan Across Galaxy Cluster Abell 1689 ] redOrbit Staff & Wire Reports - Your Universe Online Astronomers studying a new image of the massive galaxy cluster Abell 1689 have revealed the largest known population of globular clusters to date, NASA reported on Thursday. In a study published earlier this week in the online edition of The Astrophysical Journal, Karla Alamo-Martinez of the Center for Radio Astronomy and Astrophysics of the National Autonomous...

2013-09-12 12:22:18

WASHINGTON, Sept. 12, 2013 /PRNewswire-USNewswire/ -- NASA's Hubble Space Telescope has uncovered the largest known population of globular star clusters, an estimated 160,000, swarming like bees inside the crowded core of the giant grouping of galaxies known as Abell 1689. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) An international team of astronomers used Hubble's Advanced Camera for Surveys to discover this bounty of stellar fossils and confirm such compact...

Astronomers Discover New Way To Map Out Quasars
2013-07-01 12:24:07

Lee Rannals for redOrbit.com - Your Universe Online Astronomers said at a Royal Astronomical Society Meeting in St Andrews, Scotland on Monday that they have found a new way to map out quasars. Quasars are energetic and luminous central regions found in distant galaxies. When a star passes too close to a giant black hole, it is shredded by the gravitational field, producing a flare-up in the brightness of an otherwise normal looking galaxy. Astronomers observed this effect and found...


Latest Gravitational lensing Reference Libraries

67_d2968798d508f86b18fbbe3396553cd4
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...

6_fec4ca0e97baf4ce0833c41b1e6be5e62
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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