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sourav maiti
Worked at Health Department
Attended Birbhum Zilla School
Lives in India, West Bengal
871 followers|154,266 views
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sourav maiti

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+Novita Listyani , I just saw one of your Collection (Amber Moments) and remain speechless. All of your pictures are just awesome...!!!
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Suraj Ma dd








Suraj Maddalwar 
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sourav maiti

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+sourav maiti You´re welcome ! Happy weekend !
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Welcome.... my sweetu... bro....☺
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+sourav maiti You´re most welcome !!!
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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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sourav maiti
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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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Imaging Exoplanets at 1km Resolution
A new proposal for a space-based telescope positioned 11 times further away than Pluto utilises the gravitational lensing of our Sun to achieve kilometer scale resolution of candidate exoplanets orbiting other stars in our local vicinity https://www.technologyreview.com/s/601331/a-space-mission-to-the-gravitational-focus-of-the-sun/. All you need is (i) a means to block out the Sun’s light, (ii) account for the Sun’s corona, (iii) improve pointing accuracy by an order of magnitude to 0.1 nanoradians, (iv) design a propulsion system able to account for orbital motion, (v) better software and optics to account for blurring, and (vi) filtering light from the planet’s parent star. Do this and you’ll get 10,000 times more light from the exoplanet. Sounds like a worthwhile project. I only wonder about such a telescope being overtaken by technological development during a lengthy commute to 600AU or so. 
NASA says it could study features the size of Central Park on distant exoplanets by using the sun as a giant gravity lens.
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Thank You +Ray Harris ...
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Beautiful sensitive Photo's
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sourav's Collections
Story
Introduction
Hi all.........I am sourav from Suri, west bengal. I am looking for new friends. Love.....
Education
  • Birbhum Zilla School
    1994
Basic Information
Gender
Male
Birthday
September 22
Work
Employment
  • Health Department
    I.T. & Other
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Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
India, West Bengal
Previously
suri, Birbhum
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