Gravitational Physics is Newtonian Physics!
Quaternion Gravity will be an advance, when Gravitational Energy is recognized to be:
E = Newtonian Energy (-mu/r) and vector Energy (mcV) = -mu/r + mcV.
I am not sure who you are talking about but Newtons laws are very important to physics if that's what you mean.
They are named after Sir Isaac Newton, who did important contributions to physics.
Newton's contributions also include light, chemistry, telescope, and calculus.
It's a force, so newtons, N.
Gravitational pull
Newtons
B.sc Physics
Newtons are a unit of force. They are used in all sort of physics calculations.
1200 newtons
he discovered gravity
8.8 Newtons per kg
On Earth, the force of gravity exerts approximately 9.81 newtons on one kilogram of mass. This gravitational force is a result of the mass of the object and the gravitational acceleration.