The final servicing mission was scheduled for Oct. 10, 2008.

The servicing mission will extend Hubble's life and give it a more powerful view of our universe.

Although the repair is not considered urgent, scientists do not want to wait until the next servicing mission in late 1999.

Hubble is scheduled for one more servicing mission in 2004.

"Yet, I understand that you later said that nothing would change your decision to cancel the final servicing mission," she wrote.

During the second servicing mission, one of these mechanical recorders was replaced with a digital solid state recorder.

Multiple repairs to these instruments, along with a few additions, are scheduled for the next servicing mission potentially in early 2009.

On another servicing mission this March, a new mechanical refrigeration system was put in place.

The telescope was restored to its intended quality by a servicing mission in 1993.

A detailed account of the first servicing mission.