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You should be familiar with the following terms:
- refracting telescope
- reflecting telescope
- chromatic aberration
- spherical aberration
- interferometer
- artificial guide star
- very long baseline interferometers (VLBI)
- ionosphere
- magnitude scale
- brightness
- logarithm
- logarithmic
- apparent magnitude (\(m\))
- absolute magnitude (\(M\))
- inverse square law of light
- stellar parallax
- distance ladder
- arcsecond (arcsec)
- parallax angle (\(p\))
- parsec (pc)
- light-year (ly)
- astronomical unit (au)
- right ascension (RA; \(\alpha\))
- declination (dec; \(\delta\))
- luminosity (\(L\))
- center of mass
- Harvard spectral classification scheme
- Edward Pickering
- Williamina Fleming
- Antonia Maury
- Annie Jump Cannon
- Henrietta Leavitt
- Henry Draper
- OBAFGKM
- Cecilia Payne-Gaposchkin
- Meghnad Saha
- Ejnar Hertzsprung
- Henry Norris Russell
- Hertzsprung–Russell diagram (H-R diagram)
- main sequence
- main-sequence stars
- giant stars
- supergiant stars
- white dwarf stars
- luminosity classes