Tom posted a great Hubble photo demonstrating gravitational lensing. (To help translate the photo, imagine an invisible sphere slightly offset to the right from the big glowing star in the middle. Invisible sphere = gravity pulling on light = gravitational lensing.)
wind blows deeply
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Very interesting. I found a cool site awhile ago that has lots of interesting little astronomy tidbits like this. It is very educational, and has COMPLETELY changed my life in no way whatsoever.
http://antwrp.gsfc.nasa.gov/apod/astropix.html