Best Space Photos of the Week - Dec. 17, 2011

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Meteorites Trigger Avalanches on Mars

NASA/JPL-Caltech/The University of Arizona

As meteorites careen toward the surface of Mars, they can create shock waves that trigger avalanches before they even hit the ground, new research suggests. [Read More]

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Space.com is the premier source of space exploration, innovation and astronomy news, chronicling (and celebrating) humanity's ongoing expansion across the final frontier. Originally founded in 1999, Space.com is, and always has been, the passion of writers and editors who are space fans and also trained journalists. Our current news team consists of Editor-in-Chief Tariq Malik; Editor Hanneke Weitering, Senior Space Writer Mike Wall; Senior Writer Meghan Bartels; Senior Writer Chelsea Gohd, Senior Writer Tereza Pultarova and Staff Writer Alexander Cox, focusing on e-commerce. Senior Producer Steve Spaleta oversees our space videos, with Diana Whitcroft as our Social Media Editor.