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