Gravity and Spacetime

[Heruka]

By Einstein's theorem, gravity is merely an an effect of the curvature of space-time. I shall explain how.

Before Einstein came around, the three dimensions of space and the one of time were cosidered separate. Einstien unified these dimensions giving a single entity known as 'spacetime'. Now, spacetime can be simply pictured as a 'fabric', a surface, if you will. Objects are disributed on this surface. The mass of an object directly affects the spacetime matrix around it. It literally curves. Thus, you have a depression in spacetime.

Now, consider another body B, which is close to the first body A. The depression in spacetime tends to provide a tendency for the second body to be 'marooned' in the cavity, so that it seems to be experiencing a force towards the first body.
This, essentially, is gravity, according to Einstien.

Newton's equation:

F = G(m1)(m2)/r^2

-is also directly dependent on the mass of the bodies in question. This is in accordance with Einstien's theries, for a bulkier body will curve or warp spacetime more, leading to more gravitational force.

Black holes are a special case of this. A black hole is essentially a highly compressed (density is in the order of 10 to the power 20) in a tiny space. The impact of this is so powerful on the fabric (imagine a pin tearing a cloth. why? because its size is so small that a small force equals tremendous localized pressure.) that the warp it creates can suck in even light. Remember that the speed of light cannot be exceeded (don't talk to me about tachyons.)
This is an overview of gravity according to Einstien. The narly questions are coming soon. >_<

[Loffen]

Pretty infomish cool gonna look more at this when i am finished with my GUI (and get some time from my school.. they are freaky.. 30 pages in 3 weeks )

-- Loffen