; (B) the Agreement on the Rescue of Astronauts and the Return of Space Objects; (C) the Convention on Registration of Space Objects; and (D) the Liability Convention. (5) Liability Convention The term Liability Convention means the Convention on the International Liability for Damage Caused by Space Objects (signed at Washington, Moscow, and London on March 29, 1972, ratified by the United States on October 9, 1973; 24 UST 2389). (6) National of the United States The term national of the United States has the meaning given such term in section 101(a) of the Immigration and Nationality Act ( 8 U.S.C. 1101(a) ). (7) Outer Space Treaty The term Outer Space Treaty means the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies (signed at Washington, Moscow, and London on January 27, 1967, ratified by the United States on October 10, 1967; 18 UST 2410). (8) Secretary The term Secretary means, except as otherwise provided in this subtitle, the Secretary of Commerce, acting through the Office of Space Commerce. (9) Space-based remote sensing system The term space-based remote sensing system means a space object in Earth orbit that is— (A) designed to image the Earth; or (B) capable of imaging a space object in Earth orbit operated by the Federal Government. (10) Space Debris Mitigation The term space debris mitigation means efforts to— (A) prevent on-orbit break-ups; (B) remove spacecraft that have reached the end of their mission operation from useful densely populated orbit regions; and (C) limit the amount of debris released during normal operations of a space object. (11) Space object (A) In general The term space object means— (i) a human-made object located in outer space, including on the Moon and other celestial bodies, with or without human occupants, that was launched from Earth, such as a satellite or a spacecraft, including component parts of the object