English Speed of light Cited by user XOR'easter on 06 Feb 2022 The speed of light in vacuum, commonly denoted, is a universal physical constant that is important in many areas of physics.
English Gravitational shielding Cited by user Chris Capoccia on 27 Dec 2021 The term gravitational shielding refers to a hypothetical process of shielding an object from the influence of a gravitational field.