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You know the old Hughes Mearns poem, "As I was going up the stair, I met a man who wasn't there ..."Astronomers study objects we assume are really there. But sometimes they're not. A few months ago we mentioned rainbows, which stirred some controversy. Are they there? Sort of. A rainbow is nothing but a group of light rays converging on your eyes. It has no solidity. It cannot cast a shadow. But i...
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May 2005: After last fall's lunar column ("Glass half empty?" November 2004), I got letters asking why the Moon will be destroyed someday after coming too close to Earth. Good question, and it brings up a new topic: What other weird things will befall our poor planet in the eons to come? By
Bob Berman //
Published: May 1, 2005 |
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