Subject
- ccd photometry12
- interstellar medium10
- galaxy kinematics9
- stars9
- variability9
- x-ray9
- x-ray astronomy9
- black holes8
- absolute magnitude7
- extinction7
- magellanic clouds7
- millimeter astronomy7
- radio spectroscopy7
- strong-gravitational-lensing7
- submillimeter astronomy7
- white dwarf stars7
- observational-cosmology6
- photographic photometry6
- spectrophotometry6
- star atlases6
