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
The Celestial Neighborhood. â¢ Interstellar space: a ~vacuum with a virtual absence of matter. â¢ The amount of matter greatly increases approaching the Sun. â¢ The Sun ejects matter outward into space as the solar wind. â¢ Solar wind: