1700041330
1700041331
ultraviolet(UV)radiation,78-80
1700041332
1700041333
United Launch Alliance(ULA),109,111,114,161
1700041334
1700041335
University of Arizona,35,60,195
1700041336
1700041337
uranium,163,165,169-170
1700041338
1700041339
Uranus,298,305-306,327-329
1700041340
1700041341
US Defense Advanced Research Projects Agency(DARPA),133
1700041342
1700041343
US Department of Defense(DOD),111,134,281
1700041344
1700041345
US Government Accountability Office(GAO),111,157
1700041346
1700041347
US Interstate Highway System,12,141
1700041348
1700041349
Valles Marineris,220-221,288-289
1700041350
1700041351
Van Allen radiation belt,151-152
1700041352
1700041353
Vanguard 1,149-150
1700041354
1700041355
VaPER bed-rest study,48
1700041356
1700041357
VASIMR engine,339-340
1700041358
1700041359
Venera spacecraft,151-152,308
1700041360
1700041361
Venus,304,308-311
1700041362
1700041363
Vermeulen,Angelo,50
1700041364
1700041365
Verseux,Cyprien,51
1700041366
1700041367
Vesta,202-203,208,216,218,339
1700041368
1700041369
Viking Landers,239,258
1700041370
1700041371
Viking Orbiter,221
1700041372
1700041373
Villa Las Estrellas,32
1700041374
1700041375
Virgin Galactic,114,135-138
1700041376
1700041377
viruses,93
1700041378
1700041379
vision loss,70
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