He did this by relating the light-year to the Astronomical Unit â the Earth-sun distance. One Astronomical Unit, or AU, equals about 93 million miles (150 million km). Another way of looking at it: the Astronomical Unit is a bit more than 8 light-minutes in distance. A light beam takes 8 minutes to travel the 93 million miles (150 million km) from the sun to the Earth.
Lake Superior sits between Ontario, Canada and New York. Lake Ontario is mainly fed by the waters of Lake Erie, which are transported via the Niagara River. Lake Ontario drains into the St. Lawrence River. Lake Michigan is the third largest of the Great Lakes and the only one entirely within the United States.
Milwaukee Drainage Basin. 1  Manitowoc River Branch River. 2  Pigeon River Meeme River. 3  Sheboygan River Onion River.  Black 1  River. Milwaukee River Kinnickinnic River.  Root 1  River. Pike 2  River. Barnes  Creek.