grat - grou
- graticule
- grating response
- grating ring
- grating spectrographs
- gratings
- gravimetry
- gravitating disks
- gravitation
- gravitational collapse
- gravitational constant
- gravitational deflection
- gravitational effects
- gravitational energy
- gravitational equilibrium
- gravitational fields
- gravitational force
- gravitational instability
- gravitational interactions
- gravitational lenses
- gravitational radiation
- gravitational redshift
- gravitational waves
- gravitationally bound
- gravitons
- gravity
- gravity anomalies
- gravity darkening
- gravity fields
- gravity waves
- gRazing incidence
- gRazing incidence spectrographs
- gRazing incidence telescopes
- great attractor
- greenhouse effect
- Gregorian calendar
- grids
- grisms
