(NASA) A view of earth from Astronaut Michael Good's helmet-mounted camera as he works on the Hubble Telescope, Friday, April 15, 2009.

Cape Canaveral, Fla. (AP) - Spacewalking astronauts are out working on the Hubble Space Telescope for the last time ever.

John Grunsfeld and Andrew Feustel floated out of Atlantis on Monday morning on the fifth and final spacewalk for the shuttle crew. It's also the fifth and final repair mission for Hubble.

Grunsfeld and Feustel will give the 19-year-old observatory another fresh set of batteries, a new sensor for pointing, and steel foil sheets for protection against radiation and extreme temperature changes. Some of the sheet attachments are leftover work from Sunday.

If all goes well, the astronauts will set Hubble free Tuesday.

NASA says the telescope is now better than ever, and should keep working for another five to 10 years.
(COPYRIGHT 2009 BY THE ASSOCIATED PRESS. ALL RIGHTS RESERVED.)