About the misrepresentation of Albert Einstein's theory of gravity.
The way many physicists explain Albert Einstein's theory of gravity in TV and DVD documentaries, the way they write about it in books for the general public raises many questions and requires clarification.
In summary, according to these physicists Einstein stated that gravity is the warping of space - time by a massive object having considerable mass such as the sun. The planets orbit the sun because they have to follow the warping ( curvature ) of space-time around the sun. Other stars in the universe which have planets also warp space in their vicinity. By the same reasoning the moon and artificial satellites orbit the Earth, and many planets in the Solar system make their moons orbit them by warping the space-time around themselves with their great masses. Smaller objects such as asteroids generate very weak gravity because their masses are small and therefore warp the space-time around themselves very little. In fact some physicists even say that according to Einstein gravity was not even a force like Isaac Newton claimed it was. To demonstrate this, these physicists stretch a table cloth or a nylon sheet with gridlines, put a ball in the middle of the cloth / nylon stretch. The weight of the ball creates a dent in the strethed cloth. In this demonstration the stretched cloth represents the fabric of space-time, the ball in the middle represents the sun and the dent in the cloth is supposed to be the warping of space-time by the mass of the sun. Then the demonstrator rolls some smaller balls which rotate several times on the cloth around the ball placed in the middle. This is supposed to represent the orbiting planets following the curvature of space - time around the sun. And this is gravity. You can see this demonstration on many documentaries about Einstein and even in the BBC movie named Einstein