The much-anticipated Comet ISON is now within sight of amateur astronomers as it plunges toward the sun. And the National Science Foundation (NSF) is appealing to the public for pictures of the icy wander.
The much-anticipated Comet ISON is now within sight of amateur astronomers as it plunges toward the sun. And the National Science Foundation (NSF) is appealing to the public for pictures of the icy wander.