The gravitational constant, denoted by the symbol G, is a fundamental physical constant that appears in Isaac Newton's law of universal gravitation and in Albert Einstein's theory of general relativity. Its value is approximately 6.6743 × 10^-11 N(m/kg)^2. The gravitational constant determines the strength of the force of gravity between two objects with mass, and plays a critical role in our understanding of the motion of celestial bodies such as planets, stars, and galaxies.
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