1700040930
1700040931
NASA/Navy Benchmarking Exchange,42
1700040932
1700040933
National Academy of Sciences(NAS),90
1700040934
1700040935
National Defense Education Act of 1958,151
1700040936
1700040937
National Institutes of Health(NIH),96
1700040938
1700040939
National Laboratory,76
1700040940
1700040941
National Space Biomedical Research Institute(NSBRI),71
1700040942
1700040943
National Space Council,231
1700040944
1700040945
Nautilus-Ⅹ,77-78
1700040946
1700040947
Naval Research Laboratory,107
1700040948
1700040949
Nazis,99,150
1700040950
1700040951
NEAR spacecraft,207
1700040952
1700040953
Neptune,305-306,327,329-331
1700040954
1700040955
NERVA program,342
1700040956
1700040957
New Horizons mission,305,307,331-333
1700040958
1700040959
NewSpace,13,115
1700040960
1700040961
New Swabia,30
1700040962
1700040963
Newton’s third law,131
1700040964
1700040965
Nextel fiber,126
1700040966
1700040967
nickel,203-204,211
1700040968
1700040969
nitrogen,258-261
1700040970
1700040971
nitrogen tetroxide,104
1700040972
1700040973
Nixon,Richard,5,9,223
1700040974
1700040975
noise(of rockets and spacecraft),136-138,146-147
1700040976
1700040977
nuclear fission,105-106,342
1700040978
1700040979
nuclear fusion,105-106,165-168,334,342-343
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