Theoretical Boundaries not Absolute Events

Theoretical Boundaries not Absolute Events

I read an article in a Sinhala Daily, Aniddha and I have a feeling that my piece of expanding universe, loosely written may have contributed to some theoretically erroneous expansion of scientific thinking.

He is free to do so, that is how science is meant be for an open inquirer, unlike religions.

All these are theoretical concepts in physics to explain the unexplainable extent of the universe.

As I said earlier we have human and equipment limitations.

Within those limitations we have to formulate plausible theories.

Expanding universe and redshift are generally acceptable scientific notions but my point is we never see the present and only see a past event in record and make conjectures based on those records.

Black holes can be used to explain how a contracting universe would behave. 

Everything at its event horizon including particle of matter disappears and become energy forms (not destroyed but converted to another form).

Photographing a black hole is a misnomer.

What we observe is some bounced up or scattering of light energy around it.

If the gravitational force of the black hole is uncontrolled and unlimited, and that will be the end of our universe.

So, Do not kill the Universe Please.

In other words scientific thinking is not infallible.

I have given below some explanations and even Stephen Hawkin was very careful not to give absolute values but approximate assumptions.

Wikipedia Reproductions

Stephen Hawking has supposed an apparent horizon to be used.

The particle horizon differs from the cosmic event horizon, in that the particle horizon represents the largest comoving distance from which light could have reached the observer by a specific time, while the event horizon is the largest comoving distance from which light emitted now can ever reach the observer in the future.

The current distance to our cosmic event horizon is about 5 Gpc (16 billion light years), well within our observable range given by the particle horizon.

While not technically "horizons" in the sense of an impossibility for observations due to relativity or cosmological solutions, there are practical horizons which include the optical horizon, set at the surface of last scattering. This is the farthest distance that any photon can freely stream. Similarly, there is a "neutrino horizon" set for the farthest distance a neutrino can freely stream and a gravitational wave horizon at the farthest distance that gravitational waves can freely stream. The latter is predicted to be a direct probe of the end of cosmic inflation.