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