NASA's desire to provide outstanding communications support for the International Space Station, the Hubble Space Telescope, and other unmanned spacecraft moved closer to this goal in July when agency officials approved critical elements for the next generation of Tracking and Data Relay Satellites, TDRS K and TDRS L.

NASA's John C. Stennis Space Center invites journalists to view the last planned space shuttle main engine test scheduled for 2 p.m. CDT on Wednesday, July 29.

The team that operates rovers on Mars is using a test rover in southern California to assess maneuvers the Mars rover Spirit might use to get out of soft, loose soil where its wheels have sunk hub-deep. A live videocast and chat from NASA's Jet Propulsion Laboratory, Pasadena, Calif., will give viewers a chance to ask questions of rover team members working to get Spirit rolling again.

Scientists have found evidence that another object has bombarded Jupiter, exactly 15 years after the first impacts by the comet Shoemaker-Levy 9.

NASA and ATK unveil the completed Ares I first stage five-segment solid rocket booster today in Promontory, Utah. The completed solid rocket booster is now installed horizontally in a test stand that was modified from the space shuttle's four-segment configuration to fit the new five-segment Ares I booster. Instrumentation will be installed over the next month in preparation for the first major ground test of the NASA Constellation program August 25.