The doctrine that at least certain ideas (e.g., those of God, infinity, substance) must be innate, because no satisfactory empirical origin of them could be conceived, flourished in the 17th century and found in RenÃ© Descartes its most prominent exponent.
Local Curvature of Space. According to Einsteinâs theory of general relativity, massive objects warp the spacetime around them, and the effect a warp has on objects is what we call gravity. So, locally, spacetime is curved around every object with mass. Overall Curvature of Space
Astrometry, the most ancient branch of astronomy, is the measure of the sun, moon, and planets. The precise calculations of these motions allows astronomers in other fields to model the birth and evolution of planets and stars, and to predict events such as eclipses, meteor showers, and the appearance of comets.