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Solar eclipse

An annular eclipse, during which the moon and the sun are directly aligned, occurred in May 2012. Six months later, a total eclipse of the sun was seen by millions throughout parts of the Earth. (Cathleen Allison/AP Photo)

Year in Review 2012: Astronomical Wonders

Once-in-a-lifetime astronomical events and monumental scientific achievements drove people to look to the skies and online on Yahoo! throughout 2012.