Conventional physics has gravity as a constant force that depends on mass alone.
There is a constant G associated with the equation expressing the relationship between mass and force.
Every now and again, there are attempts at measuring G. However, these attempts have proven frustrating. They do not result in a fixed result.
The constant G is not behaving like a constant. Its value varies with time. Measurements sometimes come in above average, and sometimes below average.
So persistent is this deviation that we by now have enough data to say something about the variation in the measurements. We know that these measurements follow a 5.9 year cycle. We can accurately predict the kind of deviation a measurement of G will produce based on the date that the measurement is made.
From this we can conclude that there is some external factor affecting G. Either G is not in fact a constant, or the measurements are all made in such a way that they are affected by this external factor in the same way.
Most physicists have chosen to interpret the variation in measurements as something external to G. The alternative is to view Newton’s law of gravity as a proxy for a more precise description, and G as a loose approximation.
Coulomb’s Law compared to Newton’s Law
Since charge varies with capacitance, all that is needed for G to change is for our planet to change its capacitance ever so slightly. When capacitance goes up, Earth soaks up more charge and G goes up. When capacitance goes down, Earth releases charge back into space and G goes down.
Regardless of interpretation, we are stuck with the rather odd number of 5.9 years as the length of our cycle.
Adding to the mystery is the fact that the length of an Earth day is not constant either. It too varies in a 5.9 year cycle, with days sometimes being a little longer than average and sometimes a little shorter.
There appears to be a link between the length of an Earth day and the strength of gravity as expressed by the constant G.
Could it be that our planet has a pulse of sorts in which it swells and shrinks ever so slightly over a 5.9 year cycle? A swelling would slow down the planet’s rotation and at the same time increase its capacitance. Shrinking would have the opposite effect.
If Earth’s rotation on its axis is kept steady by the Sun’s output, the cycle may be related to the sunspot cycle. However, that cycle has an average length of 10.8 years. Divided by 2 it yields 5.4 years. That’s not a very good match.
However, Jupiter takes 11.86 years to orbit the Sun once. This means that Jupiter is at its closest to the Sun 5.93 years after it is at its farthest away. That’s almost exactly 5.9 years, and well within any error margin in measurements of G and day length.
Could it be that Jupiter, with its intense magnetic field, acts as a modulating force in the solar system, increasing and reducing the capacitance of the entire system? If so, we should be able to detect variations of G and day length on other planets too, and these variations should all follow the same 5.9 year cycle.