NASA is trying to beat the Moon's ass. At around 4:30 PT, NASA will propell a rocket into the South Pole of the Moon, and then turn around and slam the satellite into the poor celestial being again (the rocket is attached to the satellite but will detach right before impact for the satellite to collect data and then run into the moon some more).

Epic poster by NASA....

The astronaut's families are treated to tours, mission briefings and free admission to the Kennedy Space Center the day before the launch.