Cluster’s Deceptive Serenity Hides Violent Past

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    NASA image release March 28, 2011

    The high concentration of stars within globular clusters, like Messier 12, shown here in an image from the NASA/ESA Hubble Space Telescope, makes them beautiful photographic targets. But the cramped living quarters in these clusters also makes them home to exotic binary star systems where two stars are locked in tight orbits around each other and matter from one is gobbled up by its companion, releasing X-rays. It is thought that such X-ray binaries form from very close encounters between stars in crowded regions, such as globular clusters, and even though Messier 12 is fairly diffuse by globular cluster standards, such X-ray sources have been spotted there.

    Astronomers have also discovered that Messier 12 is home to far fewer low-mass stars than was previously expected (eso0604). In a recent study, astronomers used the European Southern Observatory’s Very Large Telescope at Cerro Paranal, Chile, to measure the brightness and colours of more than 16 000 of the globular’s 200 000 stars. They speculate that nearly one million low-mass stars have been ripped away from Messier 12 as the globular has passed through the densest regions of the Milky Way during its orbit around the galactic centre.

    It seems that the serenity of this view of Messier 12 is misleading and the object has had a violent and disturbed past.

    Messier 12 lies about 23 000 light-years away in the constellation of Ophiuchus (The Serpent Bearer). This image was taken using the Wide Field Channel of Hubble’s Advanced Camera for Surveys. The colour image was created from exposures through a blue filter (F435W, coloured blue), a red filter (F625W, coloured green) and a filter that passes near-infrared light (F814W coloured red). The total exposure times were 1360 s, 200 s and 364 s, respectively. The field of view is about 3.2 x 3.1 arcminutes.

    Credit: ESA/Hubble & NASA

    NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.

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    Ren A, hawkexpress, AnaGroockee, and 111 other people added this photo to their favorites.

    1. Western Maryland Photography 49 months ago | reply

      Wow. I wonder how many beings are looking back at us?

    2. smokejumping 49 months ago | reply

      Now the word "Infinity" has its visualization.

    3. sjonsvenson 49 months ago | reply

      Any signal from intelligent beings reaching us from there is valuable. And useless cause that intelligent form has probably died out long ago.

      (ps, got myself a new Windows wallpaper ^_^ )

    4. thoeflich 49 months ago | reply

      Sounds like a tough neighborhood, we are lucky to be stuck out here in the suburbs

    5. dodagp 49 months ago | reply

      Xmas celebrations and lights pale before this magnificent presentation
      of the "Deceptive Serenity and Violent Past "

    6. juandrob 48 months ago | reply

      This is truly humbling.

    7. Marvin Trill 38 months ago | reply

      We are not alone.

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