As Velikovsky said in his book, Earth in Upheaval:

" In 1797 the body of a mammoth, with flesh, skin, and
hair, was found in northeastern Siberia. The flesh had
the appearance of freshly frozen beef; it was edible, and
wolves and sled dogs fed on it without harm. The ground
must have been frozen ever since the day of their
entombment; had it not been frozen, the bodies of the
mammoths would have putrefied in a single summer, but
they remained unspoiled for some thousands of years. In
some mammoths, when discovered, even the eyeballs
were still preserved."

this shows that the cold became suddenly extreme ..
and knew no relenting afterward. In the stomachs and
between the teeth of the mammoths were found plants
and grasses that do not grow now in northern Siberia ..
(but are) .. now found in southern Siberia. Microscopic
examination of the skin showed red blood corpuscles,
which was proof not only of a sudden death, but that the
death was due to suffocation either by gases or water.


The Mastodon is a species that went extinct during the
past few pole shifts, primarily when the grasslands they
browsed in Siberia were drawn rapidly into the new
polar circle. But where drawn into water and drown, and
then far enough north, the Mastodons were flash frozen.
If the Mastodons were not flash frozen, they would be
in some sort of state of decay - perhaps the skin
preserved, but the internal organs a mush. This is not
the case, as your recent documentaries on the frozen state
of these preserved beasts shows! So if flash frozen, and
frozen steadily since that date, then how did the
Mastodons get green grass and buttercups in their
stomachs? A fast trot to the Arctic Circle? Does anyone
presume they ate snow? These were herbivors!

Velikovsky's work, however controversial in its time, was nothing if not exquisiutely and accurately footnoted and documented.

Back Gravity though,

so its the rotation of the galaxy and the mass of the galaxy itself that throws it out into the disc like shape? and in conclsion the black hole has no effect on our milky way galaxy, certainly not the kind of effect the sun has on our tiny solar system?