urca - viln
- urca processes
- UU Herculis stars
- UV
- UV astronomy
- UV ceti stars
- UV excess stars
- UV persei stars
- UVBY system
- UX ursae majoris stars
- V magnitude
- vacuum
- vacuum techniques
- Van Allen radiation belts
- vapor deposition
- variability
- variable sources
- variable stars
- VBLUW photometry
- velocity
- velocity curves
- velocity dispersion
- velocity distribution
- velocity ellipsoid
- velocity field
- velocity of light
- velocity space
- venaticorum
- ventilation
- vernal equinox
- vertical circles
- very large arrays
- very large telescopes
- very long baseline interferometers
- very long baseline interferometry
- vibration
- vibrational spectra
- vignetting
