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viernes, 26 de febrero de 2016

NASA : Hubble's Blue Bubble .- La burbuja azul del Telescopio Espacial Hubble

Hola amigos: A VUELO DE UN QUINDE EL BLOG., Espumosos en el centro de esta bella imagen del telescopio espacial de la NASA / ESA Hubble es una estrella Wolf-Rayet conocido como WR 31a, ubicada unos 30.000 años luz de distancia en la constelación de Carina (La Quilla). La burbuja azul distintivos que aparezcan para rodear 31a WR es una nebulosa de Wolf-Rayet - una nube interestelar de polvo, hidrógeno, helio y otros gases. Crean cuando los vientos estelares rápidos interactúan con las capas exteriores de hidrógeno expulsado por las estrellas Wolf-Rayet, estas nebulosas están con frecuencia en forma de anillo o esférica. La burbuja - se estima que se han formado alrededor de hace 20.000 años - se está expandiendo a una velocidad de 220.000 kilómetros (136.700 millas) por hora!
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A large blue bubble with a bright star in the center on a black background filled with stars
Sparkling at the center of this beautiful NASA/ESA Hubble Space Telescope image is a Wolf–Rayet star known as WR 31a, located about 30,000 light-years away in the constellation of Carina (The Keel).

The distinctive blue bubble appearing to encircle WR 31a is a Wolf–Rayet nebula — an interstellar cloud of dust, hydrogen, helium and other gases. Created when speedy stellar winds interact with the outer layers of hydrogen ejected by Wolf–Rayet stars, these nebulae are frequently ring-shaped or spherical. The bubble — estimated to have formed around 20,000 years ago — is expanding at a rate of around 220,000 kilometers (136,700 miles) per hour!

Unfortunately, the lifecycle of a Wolf–Rayet star is only a few hundred thousand years — the blink of an eye in cosmic terms. Despite beginning life with a mass at least 20 times that of the sun, Wolf–Rayet stars typically lose half their mass in less than 100,000 years. And WR 31a is no exception to this case. It will, therefore, eventually end its life as a spectacular supernova, and the stellar material expelled from its explosion will later nourish a new generation of stars and planets.

Text credit: European Space Agency
Image credit: ESA/Hubble & NASA, Acknowledgement: Judy Schmidt

Last Updated: Feb. 26, 2016
Editor: Ashley Morrow
NASA
Guillermo Gonzalo Sánchez Achutegui
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