NASA Science News for Dec. 20, 2012
This Friday, Dec. 21st, researchers will use NASA's Cassini spacecraft to observe a rare transit of Venus visible from the planet Saturn.
FULL STORY:http://science.nasa.gov/science-news/science-at-nasa/2012/20dec_transitofvenus/ (http://science.nasa.gov/science-news/science-at-nasa/2012/20dec_transitofvenus/)