The Galaxy's 200,000,000 year orbital cycle

Spiral Galaxy Velocities

• At point A, the motion of the Galaxy's spin combines with the Galaxies motion away from the center of the Big Bang. At this point in the galactic orbit, objects have their highest velocity.
• At point C in the galactic orbit, objects have a medium velocity.
• At point E, the motion of the Galaxy's spin subtracts with the Galaxies motion away from the center of the Big Bang. At this point in the galactic orbit, objects have their lowest velocity.
• At point G in the galactic orbit, objects have a medium velocity.

Spiral Galaxy Accelerations

At all points -- A, B, C, D, E, F, G and H -- the centripetal portion of acceleration from the galaxy's circular motion is constant and always pointing in towards the core of the galaxy. However, the velocity of objects in the orbit changes and thus an induced gravitational force adds to normal gravitational force.

The combined tangential and translational velocity varies. At point A, velocity is at a maximum, and at point E, velocity is at a minimum. Because of this varying effective velocity, there must be an induced portion of acceleration that is maximum at point G and a minimum at point C. At the various points in the orbit, what is happening is:

Graphic of distorted galaxy with letters A through H in 45 degree increments with A on the shortest side.

Point	Circular V	Translational V	Combined V	Centripetal A	Induced G	Galaxy Radius
A	constant	constant**	Max	constant*	declining	Min
B	constant*	constant**	declining	constant*	declining	increasing
C	constant*	constant**	declining	constant*	Min	increasing
D	constant*	constant**	declining	constant*	increasing	increasing
E	constant*	constant**	Min	constant*	increasing	Max
F	constant*	constant**	increasing	constant*	increasing	decreasing
G	constant*	constant**	increasing	constant*	Max	decreasing
H	constant*	constant**	increasing	constant*	declining	decreasing

* In reality the circular velocity of the galaxy is probably slowing decelerating.

** In reality the translational velocity of the galaxy away from the center of the Big Bang is probably slowing.

Thus every 100,000,000 years the gravitational field is medium! Every 200,000,000 years it is high, and every 200,000,000 years it is low. The Ball-of-Light Particle Model predicts that stars will be more stable on the side with higher gravity. It predicts they will be less likely to explode for example. In general, the stars would decay slower.

Graphic of M83

Is M83 an example? Is the tight arm more stable, and the loose arm more explosive? It will take many years of statistical analysis to see if this idea holds up.

While more stable stars might seem good, there can be negative affects from higher gravity:

• While a higher gravitational force might in general make a star more stable, in the sense of having less supernovas, it might also cause previously variable stars to become more variable.
• If novas are caused by the varying gravitational fields induced from binary stars with elliptical orbits, then novas might be more common.
• For planets, higher gravitational fields will cause orbits to become more elliptical just as they do for binary stars. A planet -- for this example, a star with just a single planet -- with a highly elliptical orbit will affect its star, and be affected by its star, in a more negative way than a planet with a more circular orbit.

Graphic

Since the star is more stable under higher gravity, it will give off less energy. The planet will soak up less heat as a result. However, if the planet has enough mass, and if its orbit becomes elliptical enough, it will induce de stabilizing forces in its star as it approaches the star at its closest point in the orbit. The planet would then experience more radiation in dangerous blasts from stellar eruptions.

(See also: The Solar Systems "Bobbing" Motion, and The earth's 100,000 Year Orbital Cycle)