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