Do It. Choose the wake-up song for NASA's next mission.

So let's say you're an astronaut, and you're floating in space. (Stick with me here.) You're not exactly going to get any sunrises or sunsets to help you track your days, so you figure a wake-up song is best way to begin your 'mornings.' What would you choose?

It's a pretty tough decision, and NASA is actually putting this into your hands -- quite literally. NASA is allowing people to vote for two wake-up songs to be played for astronauts on the upcoming STS-134 mission, which is jetting off April 19th and sending Endeavour to transport materials to the International Space Station. If you've been paying attention to the news, this also happens to be the mission led by Commander Mark Kelly, husband of Arizona Congresswoman Gabrielle Giffords, who was shot earlier this year in Tuscon.

Unfortunately, you won't be able to pick any old song for the astronauts. But the 10 songs up for voting are original songs made by unknown musicians, so consider this your own personal Simon Cowell moment. Check out all the songs (yes, they're all space-related) and musician bios here, and send the astronauts your well wishes in the form of a great wake-up song. Voting lasts until launch date, April 19.

-- Chau Tu

Photo credit: NASA