geodesic

apple-tree

quoting john baez From: General relativity tutorial:

Now physically, the importance of a geodesic is that any test particle
follows a geodesic in spacetime when there are no forces acting on it
besides gravity. What's a "test particle"? It's any particle small
enough that we feel okay ignoring its effect on the curvature of
spacetime. For most practical purposes, an apple is a fine test
particle. So what we are saying is that an apple in "free fall" follows
a geodesic. It is doing its best to keep going the same way. If it
seems to trac out a rather curious path in the process (a parabola,
say), well, that's just because spacetime is curved.

end quoting

We all (Me and my GrandMother)feel instinctivly that apples are very
Important to gravity!
Newton himself would not have discoverd gravity
If he didn't get an apple in his HEAD!
John Baez ABOVE make clear that test particles
Are apples!



I propose the following experiment: (BÖRJESSON'S apple experiment)

TAKE A ROCKET AND FILL IT WITH APPLES AND GO UP
TO SPACE!
THEN THROW OUT THE APPLES, AND SEE WHAT HAPPENS!

I propose the following: (BÖRJESSON'S apples)
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!
(B apples): SOME SPACE IS FULL OF APPLES!