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Subject
- gravitational waves1
- h i line emission1
- interstellar clouds1
- interstellar reddening1
- k stars1
- kron-cousins photometry1
- medium band photometry1
- north galactic pole1
- optical observation1
- protostars1
- redshifts1
- solar system1
- south galactic pole1
- standard stars1
- star atlases1
- stellar evolutionary models1
- stellar radii1
- two-color diagrams1