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December 29, 2010

Welcome to Astronomy 101 Web log

Welcome to the Astronomy 101 Web log. Active students in Astronomy 101 will be able to post and comment on recent astronomical science and discovery. Students are encouraged to post and discuss topics often and thoughtfully. If you hear about an astronomical discovery, blog about it here. Or keep an eye on APOD, NASA or the NOAO.

There are no rules other than professionalism, courtesy, and copyright respect. Please make sure your pictures are in the public domain (NASA and NOAO images are always in the public domain) and that proper citations are given.

The text of the posts and discussions (i.e. comments) should be your own. Cite properly and often. Plagiarism is grounds for immediate removal from the site.

Please note that this blog is visible to the public and that anyone with a U-M unique-name can comment.

Posted by christoq at December 29, 2010 03:43 PM


This article talks about asteroid 2011 GP59. It talks about the manner in which the object passed the closest it every has on april 15th 2011. The body is "50 meters [240 feet] long, and we think its period of rotation is about seven-and-a-half minutes." Thus, the way NASA observed the asteroid was by looking at the change in brightness caused by its ~8 minute rotation (i.e. significant changes were seen every 4 minutes due to the rotation that changed the view of the asteroid from earth). I find this article reflective of the technological advancement of our world. The manner in which we are able to predict and measure various facets of a body that will never even enter our atmosphere amazes me.

Posted by: jnana at April 18, 2011 06:54 AM

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