Double Star (satellite)

Double Star was a joint satellite mission of the China National Space Administration and the European Space Agency, and the first space mission launched by China to investigate Earth's magnetosphere. It consisted of two satellites, an equatorial satellite designated TC-1 and a polar satellite designated TC-2, and followed in the footsteps of the European Space Agency's Cluster mission by studying the effects of the Sun on Earth's environment. After an initial planned mission of one year, the Double Star mission was extended twice by both agencies, continuing until the end of September 2007. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/