Space Fan News #16: First Images of Mercury; All of Kepler's Planets; Number of Earths in Our Galaxy

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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:
Mariner 10 report:
Kepler Graphic:
Number of earth like planets:
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