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sourav maiti
Worked at Health Department
Attended Birbhum Zilla School
Lives in India, West Bengal
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sourav maiti

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Wish all my G+ friends and followers - A Happy and Colorful Week-end...!!!
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for you too my friend
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Giant Ring of Black Holes

Just in time for Valentine's Day comes a new image of a ring - not of jewels - but of black holes. This composite image of Arp 147, a pair of interacting galaxies located about 430 million light years from Earth, shows X-rays from the NASA's Chandra X-ray Observatory (pink) and optical data from the Hubble Space Telescope (red, green, blue) produced by the Space Telescope Science Institute, or STScI.

Arp 147 contains the remnant of a spiral galaxy (right) that collided with the elliptical galaxy on the left. This collision has produced an expanding wave of star formation that shows up as a blue ring containing in abundance of massive young stars. These stars race through their evolution in a few million years or less and explode as supernovas, leaving behind neutron stars and black holes.

A fraction of the neutron stars and black holes will have companion stars, and may become bright X-ray sources as they pull in matter from their companions. The nine X-ray sources scattered around the ring in Arp 147 are so bright that they must be black holes, with masses that are likely ten to twenty times that of the sun. 



An X-ray source is also detected in the nucleus of the red galaxy on the left and may be powered by a poorly-fed supermassive black hole. This source is not obvious in the composite image but can easily be seen in the X-ray image. Other objects unrelated to Arp 147 are also visible: a foreground star in the lower left of the image and a background quasar as the pink source above and to the left of the red galaxy.

Infrared observations with NASA's Spitzer Space Telescope and ultraviolet observations with NASA's Galaxy Evolution Explorer (GALEX) have allowed estimates of the rate of star formation in the ring. These estimates, combined with the use of models for the evolution of binary stars have allowed the authors to conclude that the most intense star formation may have ended some 15 million years ago, in Earth's time frame. 

These results were published in the October 1st, 2010 issue of The Astrophysical Journal. The authors were Saul Rappaport and Alan Levine from the Massachusetts Institute of Technology, David Pooley from Eureka Scientific and Benjamin Steinhorn, also from MIT.

Image Credit: X-ray: NASA/CXC/MIT/S .Rappaport et al., Optical: NASA/STScI
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Thank You +Maria Piotrowicz . Wish you the same...
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How fast...
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Thank You +himadri chatterjee ...
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Giant Galaxy NGC 6872

Over 400,000 light years across NGC 6872 is an enormous barred spiral galaxy of type SB(s)b pec, at least 4 times the size of our own very large Milky Way. Also known as the Condor Galaxy, it is approximately five billion years old. It measures 522,000 light-years (160,000 pc), making it one of the largest-known spiral galaxies. A study, dating back to 2013, claims it is the largest one.
It was discovered on 27 June 1835 by English astronomer John Herschel.

NGC 6872 is 212 million light-years (65 Mpc) from Earth and toward the southern constellation Pavo, the Peacock. Its remarkable stretched out shape is due to its ongoing gravitational interaction, likely leading to an eventual merger, with the nearby smaller galaxy IC 4970, which is less than one twelfth as large.
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Hi
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New light on Big-Bang...
Astronomers at Indiana University recently found that a galaxy nicknamed Leoncino, or "little lion," contains the lowest level of heavy chemical elements, or "metals," ever observed in a gravitationally bound system of stars.
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My new collection of Photography. Pls. comment ....
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I like it .. beautiful
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  • Health Department
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India, West Bengal
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suri, Birbhum
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Hi all.........I am sourav from Suri, west bengal. I am looking for new friends. Love.....
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  • Birbhum Zilla School
    1994
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Male
Birthday
September 22
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  • Temple Run 2