On Wed, 10 Sep 2003 09:12:49 -0400 (EDT),
(G=EMC^2 Glazier) typed:

Well we left a mirror on the moon,and it reflects a blue light back to
Earth(are best proof we were there) Why not have a rover with a laser
pulsing an intense laser beam back to Earth A gas laser produces a
continual beam of light,and maybe that is better. We use lasers now for
very accurate distance measuring. Seems a laser was a man
made invention (nature does not use a laser) Someday we will use lasers
to tell other intelligent civilizations in our galaxy that we are here.
Bert

One problem: Mars revolves on its axis and the laser would only be
pointed toward Earth for a few seconds per Martain day. Moon however
revolves so slowly one side always face Earth and the laser always point
at Earth, which makes it easier to monitor Moon than Mars.
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