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This is a normal post It does vary ever so slightly.
Sending rockets into space diminishes the planet's mass slightly; meteors add to it. There's a list of things that might make a difference, but the list is small, and the difference is smaller.
(, Fri 13 Jul 2012, 9:59, Reply)
This is a normal post Well, yeah.

(, Fri 13 Jul 2012, 10:18, Reply)
This is a normal post Thanks chaps

(, Fri 13 Jul 2012, 10:22, Reply)
This is a normal post Yep, meteors burning up in the atmosphere,
trickle down to the earth as dust, and add about 25 tonnes each day.
(, Fri 13 Jul 2012, 17:45, Reply)