The Centaur second stage for the Atlas V rocket slated to launch NASA's Solar Dynamics Observatory arrives at the Atlas Spaceflight Operations Center in Florida.

The Centaur second stage for the Atlas V rocket slated to launch NASA's Solar Dynamics Observatory, or SDO, arrives at the Atlas Spaceflight Operations Center on Cape Canaveral Air Force Station in Florida.

SDO is the first space weather research network mission in NASA's Living With a Star Program. The spacecraft's long-term measurements will give solar scientists in-depth information about changes in the sun's magnetic field and insight into how they affect Earth. Liftoff on the United Launch Alliance Atlas V is scheduled for Feb. 3, 2010. For information on SDO, visit http://www.nasa.gov/sdo. Photo credit: NASA/Jim Grossmann