Lots of really cool news out this week. The MESSENGER spacecraft took some images of Mercury, the Kepler guys put out a really neat graphic showing all of the candidate planets Kepler discovered in February, and a paper showing an estimate of the number of earth-like planets in our galaxy. Mercury's first images: http://messenger.jhuapl.edu/gallery/sciencePhotos/image.php?page=2&gallery_id=2&image_id=432 http://messenger.jhuapl.edu/gallery/sciencePhotos/image.php?page=1&gallery_id=2&image_id=437 Mariner 10 report: http://ser.sese.asu.edu/M10/M10_PDF/TM33-7_3.PDF Kepler Graphic: http://apod.nasa.gov/apod/ap110329.html Number of earth like planets: http://www.dailygalaxy.com/my_weblog/2011/03/milky-way-has-two-billion-earthlike-planets-but-how-many-earths.html http://arxiv.org/abs/1103.1443