APOD 1.5: October 7, 2011.
http://apod.nasa.gov/apod/ap111007.html
The picture for October 7, 2011 is a visually clear picture of the universe. In November 2010, the active Comet Hartley 2 became the 5th comet to be photographed by a spacecraft on the planet-Earth. Hartley 2 originated in the far-away Kuiper Belt. The surrounding planets are mainly icy cometary bodies and dwarf planets. Past research have shown that a good portion of the water in Earth's ocean is likely to have come from the Kuiper Belt. In the image, also portrayed, are open star clusters M47 and M46.
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