1700040310
1700040311
All-Terrain Hex-Limbed Extra-Terrestrial Explorer,227
1700040312
1700040313
Almaz space station,119
1700040314
1700040315
Alpha Centauri,103,244,337,341
1700040316
1700040317
aluminum,163,165,169-170
1700040318
1700040319
aluminum-ice(ALICE),104-105
1700040320
1700040321
ammonia,203,205,211,228,328-329
1700040322
1700040323
Amundsen-Scott South Pole Station,34-35
1700040324
1700040325
Ansari,Anousheh,124
1700040326
1700040327
Ansari Ⅹ Prize,134
1700040328
1700040329
Anserlian,Garo,286
1700040330
1700040331
Antarctica,27,29-37,44
1700040332
1700040333
Antarctic Treaty,31,36,160
1700040334
1700040335
antimatter,116,341-342
1700040336
1700040337
Apollo 1,3,8
1700040338
1700040339
Apollo 10,243
1700040340
1700040341
Apollo 11,4,190,223
1700040342
1700040343
Apollo 13,4,6,8
1700040344
1700040345
Apollo 14,84
1700040346
1700040347
Apollo 16,6,83
1700040348
1700040349
Apollo 17,6,83
1700040350
1700040351
Apollo program,152-153
1700040352
1700040353
appendicitis,92-93
1700040354
1700040355
aquaponics,261
1700040356
1700040357
“areology,” 287
1700040358
1700040359
argon,258-259
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