The gravitational constant is an empirical physical constant involved in the calculation of gravitational effects in
In … See more

According to Newton's law of universal gravitation, the magnitude of the attractive force (F) between two bodies each with a spherically symmetric density distribution is directly proportional to the product of their masses, … See more

The gravitational constant is a physical constant that is difficult to measure with high accuracy. This is because the gravitational force is an extremely weak force as compared to other fundamental forces at … See more

The existence of the constant is implied in Newton's law of universal gravitation as published in the 1680s (although its notation as G dates to the 1890s), but is not calculated in his Philosophiæ Naturalis Principia M… See more

Analysis of observations of 580 type Ia supernovae shows that the gravitational constant has varied by less than one part in ten billion per year over the last nine billion years. See more

• Physics portal
• Gravity of Earth
• Standard gravity
• Gaussian gravitational constant
• Orbital mechanics… See more

• Newtonian constant of gravitation G at the National Institute of Standards and Technology References on Constants, Units, and Uncertainty
• The Controversy over Newton's Gravitational Constant — additional c… See more