The reason that gravity waves, gravitrons etc have not been discovered is because they do not exist. It is because any mass in space contracts the area in which it resides that it gives the illusion of pulling objects together. Imagine a 2 dimensional piece of paper representing an area of space. First draw a vertical line in the middle and then a horizontal line to divide the sheet into 4. Call the intersection at the centre of the page point (A). From point (A) measure 4 inches up the vertical and mark this point calling it point (B).

Now place an imaginary planet Earth at point (A). Immediately point (B) is relocated one inch closer to point (A) as the planet contracts the space between point (A) & point (B). Note it is important to realize thet point (B) has not been pulled to Point(A) but that space has been compressed.

Now place an imaginary Moon at point (B). Its not important to calculate or visualize further contractions of space here as the argument is not effected. The argument under consideration now is that the moon does not orbit the earth but in fact always travels in a straight line.

Starting at point (B) the moon is travelling towards the right and its path is parallel to the horizontal line dissecting the page.From point (B) draw a parallel line to the existing horizontal line to show the straight anticipated path of our moon as it travels through space. At a place 6 inches from point (B) along the moons straight line route you can mark a point and call it (C).

From my earlier argument you will see that point (C) will be drawn closer to (A) as the Earth has compressed the space around it. Now we see that whilst the moon has in fact travelled in a straight line, it appears to have begun to orbit the Earth. The truth is that point (C) has moved.

We can complete the straight line orbit by adding point (D)(E) and so on but its the same deal as point (C). This discussion says that the moon starts at a point on the orbit where it finishes. To expand this ,my reasoning says that if you place a mass in empty space the immediate effect is for that mass to draw-in spheres of space around it like linear rods of space formed into hoops with their ends joined or bubbles if your progressing to 3D imagery.

We can go an interesting step further and regress to the flat Earth philosophy (only with an Einstein like twist). Firstly take another piece of paper and draw a circle on it. Now this circle is a 2D representation of the Earth. Mark a point at the centre of the circle and call it (A). Next mark a point at the very top of the world/circle and call it (B). Imagine a person walking clockwise around the Earth to a point 45 degrees around the circumferance to point (C). Now consider, as with the lunar orbit reasoning above, that our walker has been walking on a dead straight line and not in a circle as at first it might appear. It is the centre of mass of the Earth that has relocated point (C) to appear at a point on the circumferance of our circle. If our man keeps walking he will indeed come back to where he started as the linear track of space occupied by the surface or the planet has been formed into a hoop by the presence of Earths mass. Simple don't you think ?...............