In preparation for its arrival at Mars next year, NASA has begun putting the Mars Reconnaissance Orbiter through its paces. Controllers pointed its three cameras at the Moon and the stars, They also tested the spacecraft's onboard Context Camera and Optical Navigation Camera, and also its high-gain antenna for transmitting back to Earth. MRO was able to send back 75 gigabits of data in less than 24 hours, which is a new record for communicating with a spacecraft. It will enter Mars orbit on March 10, 2006.