Call it the ultimate absentee ballot. NASA astronauts aboard the International Space Station have the option of voting in tomorrow's (Nov. 6) presidential election from orbit, hundreds of miles above their nearest polling location.

Astronauts residing on the orbiting lab receive a digital version of their ballot, which is beamed up by Mission Control at the agency's Johnson Space Center (JSC) in Houston. Filled-out ballots find their way back down to Earth along the same path.