1.   As a small but important part of the mission, the astronauts plan to launch a group of tiny metal objects into space.

2.   As the shuttle crew retrieves Spartan, the astronauts plan to evaluate the accuracy of a new video and laser guidance system.

3.   Astronauts plan to retrieve the satellite before returning to Earth.

4.   Astronauts plan to begin four days of work on the telescope tonight.

5.   Astronauts plan to experiment with space lasers, launch and retrieve a solar observatory, and test fire a new jet pack on an untethered spacewalk.

6.   Astronauts plan to ignite dozens of small fires aboard the shuttle Columbia during an orbital research mission scheduled for launching this week.

7.   Before returning to Earth, the astronauts planned to deploy small experimental satellites developed by Argentina and the U.S. Air Force.

8.   But the astronauts also plan to install another guidance system device, a new flight computer, battery voltage regulators, a transmitter and data recorder.

9.   During a lengthy spacewalk, two astronauts plan to secure a wobbly external cargo crane.

10.   During the final spacewalk, astronauts also plan to replace the failed cooling system on a second Hubble camera.