Well, I'll be. NASA can take donations.

WHAT

http://nodis3.gsfc.nasa.gov/npg_img/N_PD_1210_001G_/N_PD_1210_001G__main.pdf


That's straight from NASA.

NASA may accept and utilize monetary gifts, donations, or bequests given as cash, check, or money order, provided they are unsolicited and offered without conditions on their use.