The curve of spacetime and orbits.?

Question

If the sun creates a well in the frabric of space-time, then what keeps a planet rotating it rather than just rushing into the well and burning up.

Answer 1

Because it is orbiting fast enough to have a velocity perpindicular to the sun's gravity. A body that is in orbit around another body is constantly falling toward the central body. It is just that its motion is causing it to constantly missing the central body. Basically as the Earth "falls into the sun" it also moving "sideways" with a sufficiently large velocity that by the time the earth has fallen the 93,000,000 miles to the sun it has also moved "sideways" about 93,000,000 miles - far enough to miss the sun.

Answer 2

Actually in the Earth -Sun elliptical orbits, the center of mass of the Sun is located at the one of the focus. The Sun's mass due to the pressure it excerts on the Substance of Space ,becomes reflected to the second focus of the ellipse ,as if if was a real mass which is actually antimatter acting as a mass structure at that focus. It is the Gravity field of Space that actually forms a distortion in its geometry. And Time is really a function of Space Substance Pressure.

If we add the inverse Gravity energies of the Earth relative to both focii we obtain the total inverse motional Energy of the orbiting Earth. Here the formula has the same form as the electron orbiting the nuclei of the atom. Hence both the magnetic phenomena as well as the gravity phenomena respond to the structure of space in the same way.
Therefore there must exist a Relativety beween the two types of Magnetic field and Gravity field which is General and encompasses both the mico- mass as well as the macromass system of structure.

The Well you are talking about is just a primitive model that tries to describe an energy pushing down of a mass as if some one had dopped it on top of a flexible rubber sheet. Of course the rubber sheet would give to the weight.The model is two dimensional.

Space is rather more complicated it has a geometry of three dimensions which continually changes as its Gravity Pressure changes with Time.
What keep the Sun and the Earth lock- in to a volume of a particular shape is caused by the interaction of Mass structures and Space Structure. You may call it a Space Power Transfer Phenomena which keeps all masses in motion. In primitive terms it is called "gravity "something that Newton had coined;Where it is actually a disturbance of
space which actually forms a low frequency wave due to the presence of macromasses oscillations.
This was a very vely interesting question.

Answer 3

A planet does not rotate about the sun, it revolves about the sun. It rotates about its spin axis. Not the same thing.

What keeps an Earth satellite in orbit? The satellite is continuously infalling. The Earth, roundly curved, is continuously falling away. The satellite keeps missing.

The rubber sheet model of gravitation is terrible! Draw a triangle on the stretched flat rubber. Its interior angles sum to 180 degrees exactly. Put a lead ball into the triangle. Its interior angles pucker and then sum to less than 180 degrees - hyperbolic space.

Draw a big triangle in spacetime (a laser and two reflectors). Its interior angles sum to 180 degrees exactly. Put a planet or star into the triangle. Its interior angles dilate and then sum to more than 180 degrees - elliptic space.

The exterior of a black hole, outside its event horizon, appears to have a reasonable circumference and therefore a reasonable diameter. If you measure *through* the black hole you find the diameter is infinite - not matter how small the thing is externally. OTOH, there's your tardis. OTOH, once you go in you cannot come out (long walk that infinity is, especially toward the end).

Answer 4

Planets are orbiting the Sun because of their velocity of travel through space. Were any particular planet to suddenly stop and come to rest in a certain spot, the pull of the Sun would draw that planet straight into the sun's firey core.