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Celestial hearts: a Valentine’s collection of space images

Photos | Slide 1 of 12: F 353716 001 Mars (677204) Scientists Discovered A Valentine From Mars When A Camera On The Mars Global Surveyor Shot A Heart-Shaped Pit, Formed When A Straight-Walled Trough Collapsed. The Pit Is About 1.4 Miles (2.3 Kilometers) At Its Widest. The  (Photo By Nasa/Getty Images)

This heart shaped pit on the surface of Mars is about 1.4 Miles (2.3 Kilometers) at its widest. 
© NASA/Getty Images
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