in fiscal years 2017 and 2018. Funds previously made available in the Consolidated Appropriations Act, 2018 ( Public Law 115–141 ) under the heading National Aeronautics and Space Administration—Space Operations that were available for obligation through fiscal year 2019 are to remain available through fiscal year 2027 for the liquidation of valid obligations incurred in fiscal years 2018 and 2019. National science foundation RESEARCH AND RELATED ACTIVITIES For necessary expenses in carrying out the National Science Foundation Act of 1950 ( 42 U.S.C. 1861 et seq. ), and Public Law 86–209 ( 42 U.S.C. 1880 et seq. )