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- Portrait of a Doomed Asteroid
A new study provides a possible explanation of mysterious X-ray flares detected by the Chandra K-ray Observatory for several years in the region of Sagittarius A*, or Sgr A*. The study suggests a cloud around Sgr A*, a supermassive black hole at the center of our Milky Way Galaxy, which contains hundreds of trillions of asteroids and comets that have been stripped from their parent stars. The flares occur when asteroids of six miles or larger in radius are consumed by the black hole. An asteroid that undergoes a close encounter with another object, such as a star or planet, can be thrown into an orbit headed towards Sgr A*. If the asteroid passes within about 100 million miles of the black hole, roughly the distance between the Earth and the sun, it is torn into pieces by the tidal forces from the black hole. These fragments would then be vaporized by friction as they pass through the hot, thin gas flowing onto Sgr A*, similar to a meteor heating up and glowing as it falls through Earth's atmosphere. A flare is produced and eventually the remains of the asteroid are swallowed by the black hole. Image Credit: Illustrations: NASA/CXC/M.Weiss
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Daily Archives: May 12, 2009
Please RT & answer @remind_org…
Please RT & answer @remind_org: Who is your hero? Please donate $5.25 to support our troops. http://bit.ly/remind #tweettoremind
Just completed the Who is Your…
Just completed the Who is Your Hero Post. Worth while cause and social experiment – will retweet their post shortly
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Who Is Your Hero Campaign
The Bob Woodward foundation has begun a tech based, social networking campaign that you should know about. You might remember that Woodward was reporting in Iraq when the convoy that he was traveling in was targeted. Woodward was wounded in … Continue reading
Posted in Experiments, Heroes
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What’s Missing?
Gary Horne has a nice piece up here. In it he has a concise op-ed on Cowboys, Indians, Good, Evil, Politicians, and values. It always comes down to values. So, how are you raising your kids?
Posted in Culture
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