Subject
- ob stars3
- radio interferometry3
- space observatories3
- star atlases3
- ccd photometry2
- correlation2
- dwarf stars2
- effective temperature2
- galaxy rotation2
- h alpha photometry2
- interstellar clouds2
- interstellar reddening2
- markarian galaxies2
- neutral hydrogen2
- peculiar variable stars2
- photographic photometry2
- radio absorption2
- radio antennas2
- radio astrometry2
- radio interferometers2
