A look back at This Week at NASA's top stories chronicling the achievements of the agencies men and women in 2008. Part 4 of 6.

A look back at This Week at NASA's top stories chronicling the achievements of the agencies men and women in 2008. Part 3 of 6.

A look back at This Week at NASA's top stories chronicling the achievements of the agencies men and women in 2008. Part 2 of 6.

A look back at This Week at NASA's top stories chronicling the achievements of the agencies men and women in 2008. Part 1 of 6.

This week in space: Mars Dust Storms, Spirit Rover Anniversary, SPACEX/Orbital Sciences/NASA Deal, Virgin Galactic

Take a look at Earth's sister planet, Venus this month as we kick off International Year of Astronomy.

Engineers test an instrument that may be used in future moon landing missions.

Archival footage shows the Apollo 15 astronauts' viewpoint during their moon landing in 1971.

In January, JPL will celebrate the fifth anniversary of Spirit and Opportunity landing on Mars, and the twin rovers will continue with their newest adventures.

This week in space: Dark energy, Mars carbonate, Google Lunar X PRIZE teams.