Is Space/Time a Constant?

Answer 1

You can compress time and space with mass and/or speed.

Get a ruler and put it on a matress. Measure say 12 inches of material and put a mark on it. Now put a bowling ball on the matress and notice where that mark is on the ruler. The mark will no longer be at 12 inches but much shorter, maybe around 8 inches.
So if you were traveling at 1 inch an hour you would cover the 12 inches in 8 hours. You can't change the ruler, the ruler is constant but you can change space/time.

You can have humans that live to the same age(earth time) but one lives on a much more denser, massive, quicker moving planet then the human that lives on the denser planet would outlive the human on earth even though though they live to the EXACT same age.

Answer 2

It is not clear what you mean by this.

Spacetime is the geometric background in which physics unfolds. In General Relativity, space has a "shape", and it is that shape that causes the movement of objects, and thereby represents the force of gravity. That shape is dynamical, meaning it changes with time as the sources of gravity move around in it.

Answer 3

no, it changes with your velocity in comparison to a separate frame of reference. An example is the twin paradox. Two twins exist both 30 years old, one stays on Earth, The other goes on a trip through space at close to the speed of light. The space faring twin returns to Earth and he is one year older, 31, but his twin has long since died of old age. Distances also dilate with increased velocities in comparison to a separate frame of reference

Answer 4

Einstein says its a constant.
It is more like a principle the makes our universe what we experience to-day.

Answer 5

if you are in earth then it's constant.but if you are in outer space it's not.the simplest ans for the toughest question