What's Hot This Week Dazzling Christmas Constellations Visible in the Winter Sky By Joe Rao The Yuletide evening sky should provide a dazzling sight for anyone willing to brave the cold this season.     Images of Mars' Phoenix Lake Region Reveal Complex Terrain By SPACE.com Staff New images of Mars' Phoenix Lake region show where complex fault lines along a vast Martian plain have resulted in terrain with contrasting light and dark appearances.     Sponsored by: Stunning Lunar Eclipse Photos Reveal Blood-Red Moon First Measurement of Earth's Inner Magnetism Made How Earth's Orbit Shaped the Sahara Alien Planet May Be in Habitable Zone After All Controversial Study Suggests Our Universe is One of Many

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