NASA's Gravity Recovery and Interior Laboratory (GRAIL) mission, whose two washing machine-sized probes were named Ebb and Flow by elementary school students in Bozeman, Mont., via a nationwide contest, have successfully completed their prime missions and have only days to go on their extended mission science collection. As planned, the duo is running low on fuel. They have been orbiting the moon since New Year's Eve and New Year's Day, respectively, giving scientists unprecedented detail about the moon's internal structure and composition.
Visuals will be available at the start of the event at: http://bit.ly/grail20121213 .
Audio and visuals of the event will be streamed live online at:
http://www.nasa.gov/newsaudio and http://www.ustream.tv/nasajpl2 .
For more information about the mission, visit: http://www.nasa.gov/grail