The exact value is not know but it is approx 6.67408*10^(-11) m^3kg^(-1)s^(-2)
Gravitational constant was determined by lord Henry cavendish in 1798 using a torsion balance .....G=6.67 *10^-9
6.67*10-11 Nm2 Kg-2
Cavendish measured the gravitational constant "G".
The gravitational constant was found by Newton, not Einstein.
The gravitational constant "G" is the same everywhere. The force of gravity on the moon, expressed as the acceleration of a falling body is 1.62 metres/sec2. compared with 9.81 m/s2 on the earth.
There is no evidence to suggest that the gravitational constant 'G' is not the exact same number everywhere in the universe.
Although Newton included the gravitational constant in his law of universal gravitational constant, its value was not determined until some 70 odd years after his death, when Henry Cavendish measured it in 1798.
Gravitational constant was determined by lord Henry cavendish in 1798 using a torsion balance .....G=6.67 *10^-9
Cavendish
1.
6.67*10-11 Nm2 Kg-2
There are several different universal constants: Avogadro's number, Gas constant, Gravitational constant. The question needs to be more specific.
Cavendish measured the gravitational constant "G".
The gravitational constant was found by Newton, not Einstein.
At the Earth's surface the nominal value is about 9.8 m/s2. The exact value varies from place to place.
The gravitational constant "G" is the same everywhere. The force of gravity on the moon, expressed as the acceleration of a falling body is 1.62 metres/sec2. compared with 9.81 m/s2 on the earth.
I think that g (the gravitational constant) varies dependent on your proximity to other massive bodies. For example the value of g on the moon is less than the value of g on earth. It is not constant throughout the universe.