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| abstraction > science > astronomy > galactic astronomy > astrometry |
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| astrometry comparison table | ||
| Subject | is a kind of | has definition |
|---|---|---|
| galactic astronomy | astronomy | The study of the Milky Way. |
| astrometry | galactic astronomy | The branch of astronomy that deals with measuring the positions of celestial objects, especially stars. Astrometrists measure parallaxes and proper motions, which allow astronomers to determine the distances and velocities of the stars. |