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Neil Armstrong

A pioneering astronaut and the first person to step onto the moon, Neil Armstrong will be remembered for leaving his footprints on the lunar surface and inspiring future generations to take larger leaps in space exploration. (AP Photo/NASA)

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.