Big dipper

the group of seven bright stars in Ursa Major resembling a dipper in outline.
Historical Examples

Kent Knowles: Quahaug Joseph C. Lincoln
Cy Whittaker’s Place Joseph C. Lincoln
Lucy Maud Montgomery Short Stories, 1905 to 1906 Lucy Maud Montgomery
Cy Whittaker’s Place Joseph C. Lincoln
The Land of the Long Night Paul du Chaillu
The Nursery, July 1877, XXII. No. 1 Various
Cy Whittaker’s Place Joseph C. Lincoln
The Stories of El Dorado Frona Eunice Wait
Lucy Maud Montgomery Short Stories, 1905 to 1906 Lucy Maud Montgomery
Earth and Sky Every Child Should Know Julia Ellen Rogers

noun
(in amusement parks) a narrow railway with open carriages that run swiftly over a route of sharp curves and steep inclines Also called roller coaster
noun
the US and Canadian name for Plough
n.
Big Dipper
An asterism composed of seven stars in the constellation Ursa Major. Four stars form the bowl and three form the handle in the outline of a dipper.