The Plough. Optical image of the group of stars known as The Plough (or Big Dipper) in the constellation Ursa Major, the Great Bear. North is at top. Ursa Major is the third largest constellation in the sky. The handle of the Big Dipper (centre left) forms the bear's tail, with the bowl (just right of centre) representing part of its back.. Stunning Photo Gifts From Science Photo Library
