rubber second
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- moderate-resolution spectrograph
- subdwarf B star
- Geneva color system
- Compton loss
- global positioning system
- standard rotational velocity star
- Hubble distance
- Great White Spot
- starburst galaxies
- bipolar planetary nebula
- membership of cluster
- terminal-age main sequence(TAMS)
- plane of trajectory orbital
- metallicity gradient
- Flat Spectrum Radio Quasars
- focal plane spectrometer
- dense star cluster
- NOAO,National Optical Astronomical
- MGS,Mars Global Surveyor
- initial planet