## Comments about "Gravitational wave" in Wikipedia

This document contains comments about the article Gravitational wave in Wikipedia
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In the last paragraph I explain my own opinion.

### Introduction

The article starts with the following sentence.
Newton's law of universal gravitation, part of classical mechanics, does not provide for their existence, since that law is predicated on the assumption that physical interactions propagate at infinite speed—showing one of the ways the methods of classical physics are unable to explain phenomena associated with relativity.
Newton's Law assumes that Gravitational radiation propagates instantaneous.
Using Newton's law starting from a binary star system a third object will wobble synchroneous with the movement of the two first independent of distance.
When gravitational radiation propagates with the speed of light this "wobbling" will be delayed as a function of distance.
The difference with Newton's Law and GR is that the predicted power loss in GR is much larger than with Newton's Law (including finite speed of gravity propagation)

### 2. History

In 1905, Henri Poincaré first proposed gravitational waves (ondes gravifiques), emanating from a body and propagating at the speed of light, as being required by the Lorentz transformations and suggested that, in analogy to an accelerating electrical charge producing electromagnetic waves, accelerated masses in a relativistic field theory of gravity should produce gravitational waves
It is nothing special that a rotating object should produce a rotating field i.e. gravitational waves. The issue is the speed with which the field propagates.

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Created: 2 November 2017

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