Recent content by Temporal

The part about the waterfall must be a misunderstanding of what the BBC show was trying to explain. Perhaps they were referring to in-falling matter or maybe they were just using an analogy so as not to confuse the viewer with concepts such as severely distorted spacetime. In any case, spacetime...

As I thought...I misunderstood your scenario. The observers in the spaceship can be considered as motionless in their frame of reference as they see the Earth go by which explains why the observers on the spaceship would see the Earth clock as moving more slowly. Thanks for the clarification...

Isn't the theory of "Gravitational Lensing" based on curved spacetime? The more massive an object is, the greater the lensing effect? This would seem to directly corroborate "mass denting spacetime".

Maybe I misunderstood your question. See the first paragraph in "Time dilation and space flight" in the "Time dilation" Wikipedia entry. It describes the effect of a spaceship traveling close to the speed of light and the differences in time that are experienced by the people on the spaceship vs...

What is it exactly that causes you to discount the idea that gravity is simply the curvature of spacetime due to the presence of matter? I'm not speaking of what actually caused the curvature (matter's interaction with the fabric of spacetime), but rather the behaviour we can directly observe...

Okay, you have two frames of reference...one in which a spaceship is traveling at relativistic speed and one which, for arguments sake, we'll consider to be stationary. As the spaceship decelerates, the time dilation effect becomes less pronounced until the spaceship is stationary...at which...

Objects don't cause gravity as they "fall in" to a gravity well. Gravity is the distortion of spacetime which is caused by matter embedded in spacetime. This distortion creates a "gravity well" with the bottom of the well being the center of mass of the object creating the distortion. Here's...

Would this not result in a linear decrease of dT/dt instead of what is experimentally observed? A chart of of speed vs time will show small decreases in dT/dt until very close to the speed of light at which time dT/dt decreases rapidly.

Look into "Gravitational Lensing" for an explanation of how light is affected by gravity. It's difficult to visualize the distortion of spacetime in 3D which is why the 2D crosshatch example is used so often. I think the thing to focus on here is that the two bodies in motion, although...

Gonna have to disagree with you on this one. Just because you can't measure cosmological expansion on the local level doesn't negate its existence. What if spacetime is a substance which exists on a scale that we can't yet examine because our current technological level is not advanced enough...

I believe you have this a bit confused. Photons travel at light speed and therefore can't possibly travel instantaneously to Earth from a far galaxy. You see the light from the far galaxy because the photons have been traveling for, in your example at least, billions of years. Since light is...