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| abstraction > data collection > astronomical catalog > catalog about star systems > galaxy catalog |
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| galaxy catalog comparison table | ||
| Subject | has definition | has object type |
|---|---|---|
| quasar catalog | quasar | |
| Shane-Wirtanen catalog | A catalog of all galaxies brighter than seventeenth magnitude (a measure of brightness). There are about a million galaxies in the Shane-Wirtanen catalogue. | galaxy or nebula (some nebulae are misidentified as galaxies) |
| Shapley-Ames catalog | A catalog of galaxies brighter than thirteenth magnitude, completed in 1932. There are about 1200 galaxies in this catalogue. | galaxy or nebula (some nebulae are misidentified as galaxies) |
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