2. Rockets Need Fuel How much fuel does a rocket need to get to the moon?

3. More than 500,000 gallons of fuel for the orbiter's three main rocket engines.

4. Time to the Moon How long does it take to get to the moon and back to earth?

5. It took them 5 days, 22 hours, 54 minutes to fly to the Moon and back to the Earth.

6. Leap Second What problems were caused by the leap second?

7. A number of organizations reported computer problems following the June 30, 2012, leap second.

8. No Gravity Why does the moon “rover” stay on the ground of the moon? I am floating!

9. NASA made the moon rover very heavy so it would stay on the ground and it has a sensor to see if there is any living creatures nearby.