1.   The astronauts began their journey into the unknown.

2.   Abbey sent over a box of pictures, and soon the astronauts themselves began to show up.

3.   After only a few days of weightlessness, astronauts begin losing bone density, she said.

4.   If that mission is a success, the first astronauts will begin living in the service module in October.

5.   The astronauts then began maneuvering the satellite into its cradle aboard the shuttle.

6.   The Mir astronauts then began broadcasting Russian folk songs to Atlantis.

7.   The National Aeronautics and Space Administration plans to phase out its use, however, as astronauts begin to assemble the space station.

8.   The six astronauts began to emerge from the shuttle an hour later and ultimately headed for bed to rest up for another attempt early Friday.

9.   When the equipment reached its destination safely, a half-dozen astronauts would begin their journey.

10.   While engineers investigated the problem and assessed its consequences, the five astronauts began playing catch-up with Mir, heading for a rendezvous and docking late Saturday night.