打字猴:1.700040963e+09
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
1700040980
1700040981 nuclear-powered spacecraft,103-104,342-343
1700040982
1700040983 nuclear war,21-22
1700040984
1700040985 Obama,Barack,158,223,247
1700040986
1700040987 Oberon,327-329
1700040988
1700040989 Occupational Safety and Health Administration(OSHA),63,82
1700040990
1700040991 Oceanus Procellarum,185,190
1700040992
1700040993 Olympus Mons,220,288-289
1700040994
1700040995 O’Neill,Gerard,117,127
1700040996
1700040997 O’Neill cylinders. See orbital cities
1700040998
1700040999 Oort cloud,334-337
1700041000
1700041001 Operation Paperclip,107
1700041002
1700041003 Operation Tabarin,30
1700041004
1700041005 Opportunity rover,250,271
1700041006
1700041007 orbital cities,5,117-118,127,219,327
1700041008
1700041009 orbital factories,130
1700041010
1700041011 orbital ring,144-145
1700041012
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