Everything is the center. There is no way to distinguish one part from any other in terms of centrality, therefore they are all equally at the center.
You say F
G = GmM/d
2 is the force of gravity between two objects ...
But when you sum up the known mass of a galaxy and compare the
way it rotates with the sum of these forces we end up with a problem: the outer arms are spinning too fast.
This means EITHER that not all the mass is known (and there is "dark matter" (and when that doesn't account for an even larger scale accounting on the universe level, "dark energy")) ...
OR the equation of gravity is not ... quite ... right ... yet.
There is evidence that we do not fully understand gravity, from the problems with a Grand Unifying Theorum (GUT) to the lack of observation of any form of graviton, what we really know is very very little.
Maybe at the subatomic level the universe
is wrapped up on itself as some of the string theory ideas lead, and what we are seeing is not an absence of matter, but an absence of distance in another dimension.
Enjoy.
ps -- nice cyan color sylas, it helps to show where the editing takes place.
This message has been edited by RAZD, 12-20-2004 08:54 PM
we are limited in our ability to understand
by our ability to understand
Rebel
AAmerican
.Zen
[Deist
{{{Buddha walks off laughing with joy}}}