Technicians inspect NASA's Juno spacecraft and its science instruments following acoustics testing at Lockheed Martin Space Systems in Denver, Colo. on Jan. 26, 2011. The test simulates the acoustic and vibration environment the spacecraft will experience during launch.

All three solar array wings are installed and stowed, and the large high gain antenna is in place on the top of the electronics vault.

Juno aims to understand the origin and evolution of Jupiter.

NASA's Jet Propulsion Laboratory, Pasadena, Calif., manages the Juno mission for the principal investigator, Scott Bolton, of Southwest Research Institute at San Antonio, Texas. Lockheed Martin Space Systems, Denver, is building the spacecraft. The Italian Space Agency in Rome is contributing an infrared spectrometer instrument and a portion of the radio science experiment. JPL is a division of the California Institute of Technology in Pasadena.

For more information about Juno, visit http://www.nasa.gov/juno.