Subject
- galaxy clusters1
- galaxy evolution1
- galaxy evolution and structure1
- giant stars1
- globular clusters1
- globular star clusters1
- ground based astronomy1
- hubble space telescope observations1
- interacting galaxies1
- merging galaxies1
- milky way galaxy1
- multiple stars1
- novae1
- optical observations1
- polarimetry1
- radio galaxies1
- solar system planets1
- spectrophotometry1
- spectroscopic binary stars1
- star atlases1
