Back (apologies for my handwriting!)
This may or may not be from outer space.
The text of the postcard is:
You just got mooned!!
BWAH HA! So funny.
[P.S. I realized after I wrote this that I sent another of the SAME(ish) postcard … this one I bought at Kennedy Space Center. The other one I bought at Johnson Space Center. Anyway – the joke is so dumb that I find it funny. My sincere apologies for the repeat(ish) postcard, Ellen.]