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astrometría
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.
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células
Las células son la unidad funcional básica de la vida (todos los organismo están compuestos por ellos). Fueron descubiertos por Robert Hooke en 1665. ...
