1.   American shuttle astronauts use the same system.

2.   As a result, most astronauts use sleeping pills while in space, Czeisler said.

3.   Astronauts will use it for housing and for conducting some research, but Zvezda will also be the base for spacewalks needed for maintenance and accelerating station construction.

4.   ILC Dover, a subsidiary of Hamilton Sundstrand, makes the suits that shuttle astronauts use during spacewalks.

5.   In other missions, astronauts use sleeping bags that can be attached to the walls, Petty said.

6.   It is the same as G-forces that astronauts use to measure the force of gravity.

7.   Lee and Meade plan to test a lightweight jet pack that may be used by astronauts assigned to maintenance tasks aboard the planned international space station.

8.   Once there, astronauts would use gasses in the Martian atmosphere to power a rover vehicle, which they would use to explore the planet, Zubrin said.

9.   Shuttle astronauts used eight vials of dust samples, including one containing volcanic ash from Mount Shasta in Northern California, for the experiment.

10.   The Discovery astronauts used spacewalks and the shuttle robot arm Monday to bolt a second new module to the growing international space station.