NASA's Mars Global Surveyor believed lost in space (Reuters)

NASA's Mars Global Surveyor spacecraft as it orbits Mars is pictured in this undated artist's conception. NASA announced November 21, 2006 that the spacecraft has likely finished its operating career. (NASA/Handout/Reuters)

to contact the probe.

Mars orbiter's decade-long mission probably over: NASA (AFP)

Mars Global Surveyor still silent (AP)

Astronomers discuss possible moon return (AP)

NASA clears space shuttle for December 7 launch (Reuters)

NASA confirms December 7 launch for shuttle Discovery (AFP)