What is the relationship between space and time?
Time was viewed independent of space—as a separate, one-dimensional continuum, completely homogeneous along its infinite extent. Any “now” in time could be regarded as an origin from which to take duration past or future to any other time instant.
What happens to time in an expanding universe?
In a matter-only Universe, the expansion rate continues to drop, eventually approaching zero. In the radiation-filled Universe, the other galaxy still gets farther and farther away as time goes on, but the galaxy not only moves away more slowly as time goes on, it slows down faster than in the matter-only case.
Are space and time the same thing?
Thus, space and time are effectively interchangeable, and fundamentally the same thing (or at least two different sides of the same coin), an effect which becomes much more noticeable at relativistic speeds approaching the speed of light.
What is the expansion of space time?
The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes. The universe does not expand “into” anything and does not require space to exist “outside” it.
What is the dark era?
The Dark Era is defined as “n > 101”. By this era, with only very diffuse matter remaining, activity in the universe will have tailed off dramatically, with very low energy levels and very large time scales. Essentially, the universe will eventually turn into a void of nothingness.
Does space and time coexist?
Space and time exist objectively. Although we may feel how time in its inexorable passage is carrying us away, we can neither halt nor prolong it. We cannot recover a single moment of existence. However, metaphysical thought separates matter from motion, and both of them, from space and time.
Can time be stretched?
Yes, but only half as much. General Relativity says that time is also stretched so the deflection is twice as great. Observation: The light from quasars is observed to be bent by gravitational lenses produced by galaxies between the Earth and the quasars.
Is time expanding or contracting?
The simple answer is that no, time is not expanding or contracting. The complicated answer is that when we’re describing the universe we start with the assumption that time isn’t expanding or contracting. That is, we choose our coordinate system to make the time dimension non-changing.
Is the universe expanding or expanding?
It’s just expanding. All of the galaxies in the universe are moving away from each other, and every region of space is being stretched, but there’s no center they’re expanding from and no outer edge to expand into anything else. But that doesn’t mean that the universe is infinite. That brings us to the long answer.
Does spacetime continue to emit energy from the universe?
Since what science tells us is that spacetime expanded away in all dirctions from the singularity, then its logical to assume that it still continues to be emitting if you will, from matter to this day. But since all the matter has spread out it maybe said that all massive bodies including subatomic particles,…
What is the best analogy for the expanding universe?
One famous analogy to explain the expanding universe is imagining the universe like a loaf of raisin bread dough. As the bread rises and expands, the raisins move farther away from each other, but they are still stuck in the dough.