Find out why astronauts exercise for hours each day in this diary entry from Expedition 16 Commander Peggy Whitson.
Find out how Earth is like a greenhouse.
Can you complete the picture?
Ted Tunes learns what force means.
Look at infrared pictures of everyday objects. Can you guess what each object is?
Certain items are not allowed on the space shuttle. Find out why.› View This Video
How can a satellite stay put over the same spot on Earth? Watch this video to find out.
Help Buzz Lightyear design a mission patch.
Find out why jumping rope and exploring space go together.
Find out if you have what it takes to be a scientist.