打字猴:1.700041013e+09
1700041013 orbital velocity,98-100,133,140,144
1700041014
1700041015 Ordovician extinction,25
1700041016
1700041017 Orion spacecraft,242
1700041018
1700041019 orthostatic hypotension,237
1700041020
1700041021 OSIRIS-REx spacecraft,206
1700041022
1700041023 osteoporosis(bone loss),68-69
1700041024
1700041025 ‘Oumuamua,23-24
1700041026
1700041027 Outer Space Treaty,31,159-160,209-210,213-215,280-282
1700041028
1700041029 ozone layer,79-81
1700041030
1700041031 Pacific Spaceport Complex-Alaska,138
1700041032
1700041033 Paine,Thomas,4
1700041034
1700041035 Pale Blue Dot (Sagan),26
1700041036
1700041037 Palma,Emilio,32-33
1700041038
1700041039 Parker,Eugene,86
1700041040
1700041041 payload cost,115
1700041042
1700041043 perchlorates,262-263
1700041044
1700041045 Pettit,Don,97n
1700041046
1700041047 Phillips,John,70
1700041048
1700041049 Phobos,242,269,291
1700041050
1700041051 phosphorus,162,203,263
1700041052
1700041053 PILOT oxygen extractor,185-186,228
1700041054
1700041055 pintle injector,110
1700041056
1700041057 Planetary Resources,Inc.,208-209,213
1700041058
1700041059 Planetary Society,340
1700041060
1700041061 platinum,202,204-205,210,268
1700041062
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