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 Nasa Stellar Fireworks

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PostSubject: Nasa Stellar Fireworks   Nasa Stellar Fireworks Icon_minitimeFri Jan 09, 2009 5:40 pm

Nasa Stellar Fireworks 299016main_stellar_full

Looking for all the world like a New Year's fireworks display, this image from NASA's Spitzer Space Telescope shows the nasty effects of living near a group of massive stars: radiation and winds from the massive stars (white spot in center) blast planet-making material away from stars like our sun. The planetary material can be seen as comet-like tails behind three stars near the center of the picture. The tails are pointing away from the massive stellar furnaces that are blowing them outward.

This picture of a portion of the W5 star-forming region, located 6,500 light-years away in the constellation Cassiopeia, is the best example yet of multiple sun-like stars being stripped of their planet-making dust by massive stars.

The sun-like stars are about two to three million years old, an age when planets are thought to be growing out of surrounding disks of dust and gas. Astronomers say the dust being blown from the stars is from their outer disks. This means that any Earth-like planets forming around the sun-like stars would be safe, while outer planets like Uranus might be nothing more than dust in the wind.
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