That portion of a policy's premium that applies to the expired portion of the policy. Although insurance premiums are often paid in advance, insurers typically earn the premium at an even rate throughout the policy term. More Risk Finance and Captives Information from IRMI.
Explorer 1 became the first successfully launched satellite by the United States when it was sent to space on January 31, 1958. A quick response to the Soviet Union's launch of Sputnik 1, Explorer 1's success marked the beginning of the U.S. Space Age.
NASA is the US National Aeronautics and Space Administration, the US government's civilian space agency. NASA was responsible for early rocket testing and the first US manned missions, culminating in the exploration of the Moon in the 1960's and 1970's. The agency created the first US space station, Skylab.