Vacuum freezing 56 Validation 88 Vallee de la Sionne 13 Valles Marineris 13 Valleys 706 Valves 27 Vanadium 16 Vapor barriers 56 Vapor diffusion 274 Vapor pressure 207 VAPOR PRESSURE 13 Vapor transfer 276 VAPOR TRANSFER 19 Variance analysis 144 Variations 1,575 Variograms 30 Varves 236 Vascular taxa 83 Vega Island 25 Vegetation 5,244 VEGETATION 462 Vegetation factors 684 Vegetation patterns 1,743 VEGETATION PATTERNS 28 Vehicles 518 VEHICLES 73 Vehicle wheels 103 Veins 80 Velocity 3,094 VELOCITY 22 Velocity analysis 21 Velocity measurement 486 VELOCITY MEASUREMENT 22 Velocity structure 110 Vendian 75 Ventifacts 15 Ventilation 517 VENTILATION 21 Vents 42 Vermes 307 Vermes--Breeding cycles and reproduction 18 Vermes--Ecology 78 Vermes--Geographic distribution 153 Vermes--Morphology 179 Vermes--Nutrition 16 Vermes--Physiology 43 Vermes--Population 86 Vermes--Taxonomy 228 Vernadskii Station 53 Vernadskiy Station 30 Vernadsky Station 44 Vertebrata 4,006 Vertical movements 90 Vertical orientation 42 Vertical seismic profiles 33 Very long baseline interferometry 23 Very low frequencies 27 Vessels 30 Vestnesa Ridge 14 Viability 60 Vibration 400 Video methods 111 Viking Program 60 Viruses 74 Viscoelasticity 302 VISCOELASTICITY 26 Viscoelastic materials 63 Viscoplastic materials 25 Viscosity 791 VISCOSITY 21 Viscous flow 106 VISCOUS FLOW 14 Viscous materials 20 Visibility 371 VISIBILITY 29 Vistulian 60 Visualization 92 Vitreous ice 51 VLF emissions 359 VLF emissions--Dawn chorus 37 VLF emissions--Hiss 89 VLF emissions--Whistlers 257 VLF methods 16 Volatile organic compounds 70 Volatiles 235 Volatilization 32 Volcanic ash 448 Volcanic earthquakes 49 Volcanic features 192 Volcanic fields 16 Volcanic glass 15 Volcaniclastics 88 Volcanic risk 33 Volcanic rocks 991 Volcanism 709 Volcanoes 1,114 Volcanology 1,199 Volume 612 Vorticity 106 Voyager Program 14