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