Space-Time?............?

To notice any difference in the speed of clocks one of the clocks must be either moving very fast or be in an intense gravity field, relative to the other clock.

If you were traveling, say, at 90 per cent the speed of light relative to your friend on the ground and you could see his clock, you would say it was moving very slow. If he could see your clock, he would say the same thing (that's the relativity part of it...to you it is the Earth that is zipping past you. As far as you could tell your clock is moving at the correct speed.

Now, with regard to gravity fields the situation is a bit different. If you were standing on a planet with an extremely high gravity field and looked at your friend on another planet far away you would think his clock was moving fast, but yours was normal. Your friend would say his clock is normal and yours is slow.

The reason these concepts are difficult to accept is to measure them you have to have extremely sensitive instruments and you have to be measuring objects that are moving at a sizable fraction of the speed of light or be in extremely high gravity fields (or be accelerating at a very fast rate.

Physicists can measure "time dilation" (as it is called) by measuring the time it takes for certain subatomic particles to decay, when they are moving at various speeds. They give them various speeds by increasing or decreasing the amount of energy they give them.

Yes, That is right because of it's Massive relative vacuum state. Black holes in space have there own set of time tables due to space and energy involved. ( Mass is not putting pressure on space )

Time slows down as you travel faster (relative to another frame of reference). That is one finding of Special Relativity. Objects in space near Earth are generally in orbit and so moving quickly relative to an observer on the ground.

Time also travels slower if you are closer to a gravitational source. This is a finding of General Relativity. Note that this means clocks run *faster* out in space compared to on the surface of the Earth (assuming you are not moving relative to someone on the Earth).

These two effects cancel each other for an orbit about 3,000km above the Earth. For higher orbits (slower, bigger gravitational difference) the clocks run faster than on Earth. For lower orbits (faster, less difference in gravity), the clocks run slower. The effect is of the order of millionths of a second per day.

because space is thicker, it slows down time!

Time slows down when you are near a strong gravitational field. For example, if you were to have two people, one on Earth and one of the space station, wear clocks, their times would not match

The person on Earth would notice the person on the space stations clock was ticking a little quicker than their own. This is due to gravity not being quite as strong. The opposite is true. The person on the space station would notice the person's Earth clock ticking a bit slower, due to the gravitational field being stronger

Of course, the time difference is so small as to be unnoticeable. We'd notice big differences if we were traveling near the speed of light or near a very strong gravitational field

Time slows down the faster you travel. It doesn't mater if you are in space or not. You have to be traveling extremely fast to notice it, though. Going 70 mph in a car won't make a difference. You would need to approach the speed of light. (186,000 miles per second)