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