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Spiral Overlaid with Milky Way Gems
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NGC 6384 Spiral Galaxy RA 17h 32m 23.81s Dec 7° 3' 43.42" Ophiuchus 77 million light-years 10.4 6.2 by 4.1? arcminutes 3.23 x 1.53 arcminutes North is 67.0° left of vertical ESA/Hubble & NASA February 21, 2011 |
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ABOUT
THIS IMAGE: The NASA/ESA Hubble Space Telescope has produced this finely detailed image of the beautiful spiral galaxy NGC 6384. First discovered by Albert Marth on June 10, 1863, this galaxy lies in the constellation of Ophiuchus (The Serpent Bearer), not far from the center of the Milky Way in the sky. The positioning of NGC 6384 means that we have to peer at it past many dazzling foreground Milky Way stars that are scattered across this image. In 1971, one member of NGC 6384 stood out against these bright foreground stars when one of its stars exploded as a supernova. This was a Type Ia supernova, which occurs when a compact star that has ceased fusion in its core, called a white dwarf, increases its mass beyond a critical limit by gobbling up matter from a companion star. A runaway nuclear explosion then makes the star suddenly as bright as a whole galaxy. While many stars have already come to the ends of their lives in NGC 6384, in the center, star formation is being fuelled by the galaxy's bar structure; astronomers think such galactic bars funnel gas inwards, where it accumulates to form new stars. This
picture was created from images take with the Wide Field Channel of Hubble's
Advanced Camera for Surveys. An image taken through a blue filter (F435W,
colored blue) was combined with an image taken through a near-infrared
filter (F814W, colored red). The total exposure times were 1050 sec through
each filter and the field of view is about 3 x 1.5 arcminutes. |
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