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domingo, 19 de octubre de 2014

NASA : Hubble Catches a Dusty Spiral in Virgo

Hola Amigos: A VUELO DE UN QUINDE EL BLOG., Esta magnífica nueva imagen tomada con el Telescopio Espacial Hubble de la NASA / muestra la galaxia espiral de canto NGC 4206, situada a unos 70 millones de años luz de distancia de la Tierra en la constelación de Virgo.
Captado aquí son vastas franjas de polvo, algunos de los cuales están oscureciendo el bulbo central, que sólo se puede hacer en el centro de la galaxia. Hacia los bordes de la galaxia, los cúmulos dispersos, que aparecen azul en esta imagen, marcan las zonas donde están naciendo estrellas. La protuberancia, por otra parte, se compone principalmente de estrellas mucho más antiguas, más roja, y la formación de estrella muy poco tiene lugar..............................


Hubble Catches a Dusty Spiral in Virgo
 
This magnificent new image taken with the NASA/ESA Hubble Space Telescope shows the edge-on spiral galaxy NGC 4206, located about 70 million light-years away from Earth in the constellation of Virgo.
Captured here are vast streaks of dust, some of which are obscuring the central bulge, which can just be made out in the center of the galaxy. Towards the edges of the galaxy, the scattered clumps, which appear blue in this image, mark areas where stars are being born. The bulge, on the other hand, is composed mostly of much older, redder stars, and very little star formation takes place.
NGC 4206 was imaged as part of a Hubble snapshot survey of nearby edge-on spiral galaxies to measure the effect that the material between the stars — known as the interstellar medium — has on light as it travels through it. Using its Advanced Camera for Surveys, Hubble can reveal information about the dusty material and hydrogen gas in the cold parts of the interstellar medium. Astronomers are then able to map the absorption and scattering of light by the material — an effect known as extinction — which causes objects to appear redder to us, the observers.
NGC 4206 is visible with most moderate amateur telescopes at 13th magnitude. It was discovered by Hanoverian-born British astronomer, William Herschel on April 17, 1784.
European Space Agency
Credit:  ESA/Hubble & NASA, Acknowledgement: Nick Rose
NASA
Guillermo Gonzalo Sánchez Achutegui
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