Arecibo

> I'd never put a cd in my micro wave, as it would
> likely ruin the micro wave generator, which used to be
> a klystron tube, but has probably been replaced by
> something solid state these days,,,

Actually, you're wrong. Clearly, your sense of adventure is slipping.

A ten-second google search (+CD +microwave) resulted in the following link:

http://www.prairienet.org/~tatwell/cd_burning.html

I've done it many times... whenever I need to throw away a CD that has
information on it.