What is at the edge of our Observable Universe?

This is the answer I gave to this question:

Here is the answer:

The edge of the Universe depends upon time.

For example, the objects within a time window of 2 seconds only include the Moon. If I change that window to 8 minutes, then you will be able to see the Sun.

The Milky Way requires my time window to be more than 100 thousand years.

To see Andromeda, my time window has to be several million years…

To see the Cosmic Microwave Background, when the time window is around 14 billion years.

There is nothing at that distance other than hot plasma.

In other words, at the edge of our observable Universe, there is nothing but hot hydrogen. If you go there you will not see anything because hot hydrogen (plasma) is opaque…

If you could move further into that plasma (by moving further backward in time), its density would increase and increase until it reached the density of a Neutron Star. At that point, you would be converted into neutrons and not be able to see anything. The temperature would be close to zero Kelvin and you would be in the Neutronium Phase of the Universe.

There is nothing to see there…. no planets, no green aliens…

The reason the Universe is like that is that the Universe is a Lightspeed Expanding Hyperspherical Hypersurface:

The Hypergeometrical Universe Theory (HU) is the only theory that can support the Lightspeed Expanding Hyperspherical Universe (LEHU) topology. The reason for that is that LEHU is not a solution to Einstein's equations and HU provides a replacement for it.

In the above figure, you can see yourself at position A, looking into the sky and seeing the photons coming from the CMB. Those photons will come from a position close to 1 radian Cosmological Angle. In other words, the AOD angle is the COSMOLOGICAL ANGLE and it is around 1 radian.

The surfaces in this drawing are 3D hypersurfaces. Our whole Universe (with three dimensions) is the outermost hypersurface.

So, we can only see light coming from the inner surfaces (when our Universe was smaller, denser, and more homogeneous).

Your question is because you think that we can see sideways (within the CURRENT UNIVERSE or outermost hypersurface). We cannot.

That said, we don’t need it. My theory - THE HYPERGEOMETRICAL UNIVERSE THEORY (HU) tells you that the galaxy in position B will move only radially to position D.

In other words, if you can measure the Cosmological Angle AOD, you can figure out where everything is in the current Universe. So, you can map what you see in the sky (our past) with what is there in the CURRENT UNIVERSE.

This is a 3D Map of the Current Universe that I created by projecting the Sloan Digital Sky Survey 1.3 million galaxies onto their CURRENT UNIVERSE POSITIONS.

The data has artifacts associated with how they collected data. The protocol is called CMASS, or constant mass. For any given redshift z (distance), they only collected galaxies with the same luminous mass. The arbitrary choice of which mass to use (for each distance) resulted in the modulation of density along the radial direction.

This data was to be used as sets of galaxies within each distance. They were only interested in two-point correlations within the spherical surfaces determined by a given redshift z. They were not interested in correlations across the volume, so the mass was arbitrary.

Their choice of CMASS is still puzzling to me.

Below I used the CMB observation to create the density fluctuations we should observe in the sky (as we probe the past all the way to the Recombination Epoch).

3D Map of the Observable Universe all the way to the epoch of Recombination.

So, as we start the video, you see a small radius around us. Because it is small, one should observe a more homogeneous sky. As the radius increases, we probe farther and farther distances, until for the last image, we replicate the CMB observation.

Follow the link below to see how I created the map of the Observable Universe (from a single CMB observation).

IN SUMMARY

If you place an observer at the edge of the observable Universe, that observer would be cooked by the plasma. He wouldn’t see anything because plasma is opaque.

If you place the observer further down, he would be stuck inside of a vibrating and very cold Neutronium.

If you could stick the observer further, he would be inside of a Blackholium. Follow the link below to understand the Big Pop Cosmogenesis:

HU - The Big Pop Cosmogenesis Equation of State

Everything you see in the sky (galaxies) is present in the CURRENT UNIVERSE. I explained how to project the galaxy positions you see in the sky onto the CURRENT UNIVERSE (using the Cosmological Angle), so, it shouldn’t be a problem to know exactly what the edge of the Universe looks like.

For example, at the very edge of the Universe, you will find HD-1

Of course, HD-1 will be older and larger due to aggregating more and more hydrogen to create stars and through accretion by colliding with other galaxies in the neighborhood. That said, HD-1 will be at the edge of the CURRENT UNIVERSE.

If you could look further (IN THE CURRENT UNIVERSE) than HD-1, you would see more of the same. The Universe is hyperspherically symmetric. Our 3D Universe is the surface (3D Hypersurface) of a Globe (hyperspherical shell).

Always feel free to ask questions!