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This is the same photo from the last snap n tell, cropped out from a larger image to display the constellation Taurus.
The unclosed grey box is an open star cluster Pleiades., also called the Seven Sisters in the Greek Mythology. Being the closest and brightest star cluster to earth, it's one of the few star clusters you can see with your naked eye.
More information on Pleiades Star Cluster is available here in Wiki.