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