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27 May 2010
Andromeda's Unstable Black Hole
The Andromeda galaxy, the closest spiral galaxy to our own Milky Way, has a supermassive black hole at the center of it much like other galaxies. Because of its proximity to us, Andromeda – or M31 – is an excellent place to study just how the supermassive black holes in the centers of galaxies consume [...]
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11 May 2010
X-Ray Observations Find Evidence for "Missing Matter" in the Universe
From a Chandra press release:Scientists have used NASA's Chandra X-ray Observatory and ESA's XMM-Newton to detect a vast reservoir of gas lying along a wall-shaped structure of galaxies about 400 million light years from Earth. In this artist's impression, a close-up view of the so-called Sculptor Wall is depicted. Spiral and elliptical galaxies are shown [...]
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25 April 2010
GOODS, Under Astronomers' AEGIS, Produce GEMS
No, not really (but I got all three key words into the title in a way that sorta makes sense). Astronomers, like most scientists, just love acronyms; unfortunately, like most acronyms, on their own the ones astronomers use make no sense to non-astronomers. And sometimes not even when written in full: GOODS = Great Observatories Origins Survey; OK [...]
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17 March 2010
Spitzer Spies Earliest Black Holes
The Spitzer Space Telescope has found what appear to be two of the earliest and most primitive supermassive black holes known. "We have found what are likely first-generation quasars, born in a dust-free medium and at the earliest stages of evolution," said Linhua Jiang of the University of Arizona, Tucson, lead author of a [...]
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17 February 2010
Merging White Dwarfs Set Off Supernovae
New results from the Chandra X-Ray Observatory suggests that the majority of Type Ia supernovae occur due to the merger of two white dwarfs. This new finding provides a major advance in understanding the type of supernovae that astronomers use to measure the expansion of the Universe, which in turns allows astronomers to study [...]
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08 February 2010
Caught in the Act! Merging Galaxies Create a Binary Quasar
Excellent teamwork by astronomers working in two different wavebands – x-ray and optical – has lead to the discovery of a binary quasar being created by a pair of merging galaxies. "This is really the first case in which you see two separate galaxies, both with quasars, that are clearly interacting," says Carnegie astronomer John Mulchaey [...]
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26 January 2010
Twin Tails Tell a Crazy Tale of Star Formation
Stars forming outside a galaxy? That's what a new observation with the Chandra X-ray Observatory appears to show. “This system is really crazy because where we’re seeing the star formation is well away from any galaxy,” said Megan from Michgan State University. “Star formation happens primarily in the disks of galaxies. [...]
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05 January 2010
Chandra Stares Deep into the Heart of Sagittarius A*
Caption: Latest Chandra image of Sgr A*. Credits: X-ray: NASA/CXC/MIT/F. Baganoff, R. Shcherbakov et al. How long can you stare at an object? This Chandra image of the supermassive black hole at the center of the Milky Way Galaxy, known as Sagittarius A* (or Sgr A* for short)Sgr A* and the surrounding region is based on [...]
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04 January 2010
Stellar Destruction Could Be from Intermediate Black Hole
NGC 1399, an elliptical galaxy about 65 million light years from Earth. Credit: NASA, Chandra A dense stellar remnant has been ripped apart by a black hole a thousand times as massive as the Sun. If confirmed, this discovery would be a cosmic double play: it would be strong evidence for an intermediate mass black [...]
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17 December 2009
Shapes Reveal Supernovae History
These two supernova remnants are part of a new study from NASA's Chandra X-ray Observatory that shows how the shape of the remnant is connected to the way the progenitor star exploded. Credit: NASA/CXC/UCSC/L. Lopez et al.) At a very early age, children learn how to classify objects according to their shape. Now, new research [...]
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10 November 2009
Great Observatories Combine for Stunning Look at Milky Way
All we can say is, "Wow!" In celebration of the International Year of Astronomy 2009, NASA's Great Observatories — the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory — have collaborated to produce an unprecedented image of the central region of our Milky Way galaxy. This is a never-before-seen view [...]
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04 November 2009
Neutron Star at Core of Cas A Has Carbon Atmosphere
A Chandra X-ray Observatory image of the supernova remnant Cassiopeia A. Credit: NASA/CXC Supernova remnant Cassiopeia A (Cas A) has always been an enigma. While the explosion that created this supernova was obviously a powerful event, the visual brightness of the outburst that occurred over 300 years ago was much less than a normal supernova, [...]
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22 October 2009
Galaxy Cluster Far, Far Away Smashes Distance Record
A galaxy cluster located about 10.2 billion light years from Earth has been discovered by combining data from NASA's Chandra X-ray Observatory with optical and infrared telescopes. The cluster, JKCS041, is the most distant galaxy cluster yet observed, and we see it as when the Universe was only about a quarter of its present [...]
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22 September 2009
New Chandra Deep X-ray Image of the Galactic Center
Chandra has done it again in creating some of the most visually stunning images of our Universe. This time, Chandra's X-ray eyes show a dramatic new vista of the center of the Milky Way galaxy. This mosaic from 88 different images exposes new levels of the complexity and intrigue in the Galactic center, [...]
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01 September 2009
After Loss of Lunar Orbiter, India Looks to Mars Mission
After giving up on re-establishing contact with the Chandrayaan-1 lunar orbiter, Indian Space Research Organization (ISRO) Chairman G. Madhavan Nair announced the space agency hopes to launch its first mission to Mars sometime between 2013 and 2015. Nair said the termination of Chandrayaan-1, although sad, is not a setback and India will move ahead [...]
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