To prevent bone and muscle loss, astronauts must do this for two hours every day on the International Space Station.
What is exercise?
200
The Hubble telescope has a 94 1/2 inch mirror inside and is as large as a plane, a car or a school bus.
What is a school bus?
300
Astronauts aboard the International Space Station are supposed to do this for about 8 hours everyday.
What is sleep?
300
When the International Space Station was first built, this many countries came together to help.
What is sixteen?
400
The International Space Station is as large as a baseball diamond, a football field or a tennis court.
What is a football field?
400
The Gamma Ray Large Area Space Telescope (GLAST) provided scientists greater detail and accuracy when viewing things in space. It was launched in 2000, 1997 or 2005.
What is 2005?
500
Crews have lived on the International Space Station since the year 2000, 1776 or 1981.
What is 2000?
500
The Hubble Space Telescope uses two arrays or panels to help power it, along with the help of this.