reply to post by Sinter Klaas
OK, I'll play....
If and I repeat if, a hollow earth would be reality.
(Adjusting science fiction/fantasy hat...)
OK, all set, let's go! ---
That would mean the current understanding of gravity would be wrong.
Which aspect of our understanding of gravity?
Certainly not how it's calculated, and measured. That is pretty clear, has been for centuries. IF there were some "glitch" in how gravitational
work, then it would have been noticed long ago, especially since we've been involved in spaceflight technology.
The fundamental forces of gravity, and how it influences motion on a cosmic scale, such as our Solar System for instance, is also well understood, and
the math is irrefutable.
But, as to "understanding" gravity, in another sense? Meaning, the full and complete theory of gravity, and its origins?
THAT is a bit of a debate, in cosmological circles, and theoretical physics arenas. It is, for want of better term, the 'mechanism' within the
fabric of space/time that causes any mass to exert a force that we have labeled 'gravity'. That's the Einsteinian view, that has worked so
It (gravity) is measurable, predictable, mathematically repeatable in the equations; but the actual nature of our Universe, the real reason
things act as they do, is still partially hidden from view.
The Universe is a bit inscrutable, in that sense...teasing us with a glimpse, but not the entire story...yet.
Because there's a hot debate about whether gravity obeys the limit of EM radiation (speed of light), (which, if you posit a 'graviton', or particle
that 'carries' gravity, or so-called gravity 'waves'....see, it gets esoteric...)....or if it's intantaneous everywhere, all at once....
TOP minds are agonizing over these concepts, as we speak (or read).
Is that what you meant?
[edit on 24 June 2010 by weedwhacker]