watch list. Sec. 606. Human space exploration risk. 2. Definitions In this Act: (1) Administrator The term Administrator means the Administrator of NASA. (2) Cis-lunar space The term cis-lunar space means the region of space from the Earth out to and including the region around the surface of the Moon. (3) ISS The term ISS means the International Space Station. (4) NASA The term NASA means the National Aeronautics and Space Administration. (5) Near-Earth asteroid The term near-Earth asteroid means an asteroid with a perihelion distance of less than 1.3 Astronomical Units from the Sun. (6) Near-Earth object The term near-Earth object means an asteroid or comet with a perihelion distance of less than 1.3 Astronomical Units from the Sun. (7) Nonprofit organization The term nonprofit organization means an organization determined by the Secretary of the Treasury to be an organization described in section 501(c)(3) of the Internal Revenue Code of 1986 ( 26 U.S.C. 501(c)(3) ) which is exempt from taxation under section 501(a) of such Code. (8) Orion The term Orion means the multipurpose crew vehicle described under section 303 of the National Aeronautics and Space Administration Authorization Act of 2010 ( 42 U.S.C. 18323 ). (9) Space Launch System The term Space Launch System has the meaning given the term in section 3 of the National Aeronautics and Space Administration Authorization Act of 2010 ( 42 U.S.C. 18302 ). I Authorization of Appropriations 101. Fiscal year 2018 There are authorized to be appropriated to NASA for fiscal year 2018, $20,736,140,000, as follows: (1) For Science, $6,221,500,000, of which— (A) $1,921,000,000 is for Earth Science