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