Quote:
Originally Posted by Atmos
The universe starting as a dot in the most logical if you think of the universe as "flat" as it started somewhere at some point and expanded from there. Much like what happens behind the event horizon of a black hole, we don't actually know what happens when we compress matter excessively. A black hole to us is really just the event horizon, a point where the gravitational well of space time is steeper than the speed of light. As for what happens in the cosmic soup before the universe became visible? Lets peer into a black hole and see :wink:
|
That's such an interesting comparison.
What's inside a black hole is the subject of debate and research in theoretical physics. It may not be a singularity, all we can say is that you have a given mass inside the Schwarzschild radius (event horizon).
The radius of the event horizon for any given mass black hole, the Schwarzschild radius, can be calculated using r = 2GM/c^2.
So if the Earth became a black hole it would have an event horizon radius of 8.87 millimeters. For the Sun, less than 3km. A black hole the mass of the entire Milky Way would be 11.2 million kilometers, easily inside the orbit of Mercury.
However, the interesting one is the event horizon for a black hole the mass of the entire visible universe. It would have a radius of around
157 billion light years. That's
larger than the observable universe, so is it possible our universe is inside a black hole? Is it possible that big bang might have been an expansion of the singularity in the black hole we live in.
Since there is no way to know how matter is arranged inside a black hole or to prove that we live inside one we may never know. But it is possible, and interesting to think about.
Chris