@Omega,
Time is not as infinite as you think. As a dimension it is radically different than the other 3: you cannot go back in time. You cannot remake the cube, or if you manage to do, things will not be the same.
The reason for this is entropy. Entropy increases as time passes. We are not part of a wheel, entropy will never become the same again.
Lots of guys tried to maneouver around this limitation. They all failed, whether they tried to so with experiments or mathematical tricks.
Theory allows trips at super-light speeds, with the use of wormholes and other theoretical structures. But you cannot go back in time. Also you cannot escape time, you cannot pause time.
The theory of pulsing universe is a logical one, but the new universe after a new big bang won't be the same. It will start with more entropy.
Black holes do exist. A singularity is a different thing than a black hole. A singularity is a single spot, a mathematical creature that is not present in the universe.
A black hole is better described by its diameter. The diameter is defined as the distance at which escape speed becomes equal to the speed of light, so anything that is emitted from inside this diameter will never escape.
The diameter of the black hole doesn't have to be the diameter of the ultra-dense star that is in the center. Not only this form is easy to understand, but it is also present in the universe in great numbers. We have actually discovered quite a few black holes. Hawking even proved that there is some radiation that manages to escape from inside their diameter because of turbulence, centrifugal forces and quantum phenomena.
A black hole is a thing with great density and mass. It is not theoretical, it is present in the universe. It does not have to be ultra dense. The escape speed from the surface of the earth is 11.2 km/s. As we can all guess, this speed is higher on the surface of Jupiter, and even higher on the surface of Sun. Now, is it hard to imagine that a very dense body can have an escape speed of 400000 km/s? A big neutron star, for example.
The singularity, on the other hand, is such a weird concept that my head tends to explode every time I try to figure it out.
Time is not as infinite as you think. As a dimension it is radically different than the other 3: you cannot go back in time. You cannot remake the cube, or if you manage to do, things will not be the same.
The reason for this is entropy. Entropy increases as time passes. We are not part of a wheel, entropy will never become the same again.
Lots of guys tried to maneouver around this limitation. They all failed, whether they tried to so with experiments or mathematical tricks.
Theory allows trips at super-light speeds, with the use of wormholes and other theoretical structures. But you cannot go back in time. Also you cannot escape time, you cannot pause time.
The theory of pulsing universe is a logical one, but the new universe after a new big bang won't be the same. It will start with more entropy.
Black holes do exist. A singularity is a different thing than a black hole. A singularity is a single spot, a mathematical creature that is not present in the universe.
A black hole is better described by its diameter. The diameter is defined as the distance at which escape speed becomes equal to the speed of light, so anything that is emitted from inside this diameter will never escape.
The diameter of the black hole doesn't have to be the diameter of the ultra-dense star that is in the center. Not only this form is easy to understand, but it is also present in the universe in great numbers. We have actually discovered quite a few black holes. Hawking even proved that there is some radiation that manages to escape from inside their diameter because of turbulence, centrifugal forces and quantum phenomena.
A black hole is a thing with great density and mass. It is not theoretical, it is present in the universe. It does not have to be ultra dense. The escape speed from the surface of the earth is 11.2 km/s. As we can all guess, this speed is higher on the surface of Jupiter, and even higher on the surface of Sun. Now, is it hard to imagine that a very dense body can have an escape speed of 400000 km/s? A big neutron star, for example.
The singularity, on the other hand, is such a weird concept that my head tends to explode every time I try to figure it out.