sentence: Special relativity holds in all the universe in local space and time.
sentences_after: Otherwise, general relativity holds. There is no explanation for the particular values that physical constants appear to have throughout our Universe, such as Planck's constant 'h' or the gravitational constant 'G'. Several conservation laws have been identified, such as the conservation of charge, conservation of momentum, conservation of angular momentum and conservation of energy.
concept_name: special relativity
headings: Universe Basic data on the Universe
categories: Reality