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Sky & Telescope January 2011 Print Issue
Without water, there would be no life on Earth. And yet surprisingly, the origin of our planet's water remains a mystery. Many leading scientists think Earth formed with little or no water. Yet somehow, it picked up a large inventory of water that's enough to fill our oceans. For years, astronomers suspected comets as the main source. But recent evidence points to objects closer to home: asteroids.
In this same issue, the Sky & Telescope editors summarzie the "hottest" new astronomical products for 2011. These include telescopes large and small, eyepieces, CCD cameras, binoculars, mounts, software, and a host of accessories.
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