In terms of the size and shape of the universe, what is the comparison of the size of the universe?

I'm a super astrophysics enthusiast and I might be able to help you a little.

The first question is that scientists now estimate the age of the universe by relying on the farthest star that can be seen plus the parameters, and the specific algorithm is not known, but at present, the farthest star that Hubble can see is about 15 billion light years, and now it is generally accepted that the universe is the big ** theory, so there is no paradox in the age of the universe calculated according to these.

The second question is that our universe is a hypercircle, which is a bit like a sphere from our usual four-dimensional perspective, but not hollow, the universe is a vacuum, but not hollow, and the universe is enriched by all kinds of energy, gravitational rays, stars, stars, and dark matter You can find it by searching for a detailed explanation.

I hope you are satisfied with this answer.

At present, most of the theories of the universe are hypotheses based on assumptions, and have not yet formed a complete and unified system, and various theories have their own strengths, so it is normal to have paradoxes, and as for the shape of the universe, it depends on how you define the universe.

The size of the universe depends on the fastest propagation speed in the universe, which is currently known as the speed of light.

The speed of light is as big as the universe is as old as it is.

The universe was only the size of a pea at the beginning, and then there was a huge ** that the universe expanded, and it is still expanding until now, it is a sphere.

Being on the same plane and flying horizontally to get there? Or do you have to fly up or down to get to a certain destination?

The universe was a very small singularity at the beginning, and then it became about the same size in an instant, and it was still in infinite expansion, and its shape was unknown to no one, because no one knew its edge, and it was infinitely large to us

First, it is true that only 15 billion light-years of stars can be seen (unless there is a faster propagation of light in the universe, in fact, it has been proven that light is not the fastest in the universe).

Second, if we live in three-dimensional space, then the universe should be in a higher dimensional space, not as simple as a plane or a sphere.

The universe size ranking is Sun, Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, Mercury.

The physical universe is defined as all space and time (collectively referred to as space-time) and their connotations, including all forms of energy, such as electromagnetic radiation, ordinary matter, dark matter, dark energy, etc., of which ordinary matter includes planets, satellites, stars, galaxies, galaxy clusters, and intergalactic matter. The universe also includes physical laws that affect matter and energy, such as conservation laws, classical mechanics, relativity, etc.

The size of the universe is a bit difficult to define. According to the general theory of relativity, due to the finite speed of light and the constant expansion of space, distant regions of space may never interact with space near the Earth, even during the lifetime of the universe.

For example, space may expand faster than the speed of light passing through it, and even though the universe exists forever, radio messages sent from Earth may never reach some areas of space.

The universe may be fine-tuned. The fine-tuning universe hypothesis is a proposition that only certain fundamental physical constants of the universe are within a very narrow range of values that may allow the conditions for life in the universe to occur.

Thus, if any of the several fundamental constants are only slightly different, the universe is unlikely to be conducive to the generation and development of matter, astronomical structure, elemental diversity, or life in an intelligible universe. This proposition has been discussed by philosophers, scientists, theologians, and proponents of creationism.

The cosmic planet size ranking is the Sun,Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars,Mercury

The solar system is made up of the Sun, large planets and their moons, asteroids, comets.

A celestial system composed of meteoroids and interplanetary matter. The Sun is the central body of the solar system, accounting for the total mass, and all other celestial bodies revolve around it under the bow force of the Sun. The sun is the only one in the solar system that reacts thermonuclearly.

Glow. of stars, other celestial bodies shine by reflecting the sun's light.

Physical. Of the four fundamental interactions, gravity dominates the astronomical scale. Gravitational effects are cumulative, in contrast, the effects of positive and negative charges tend to cancel each other out, making the electromagnetic force relatively insignificant on astronomical scales.

The other two interactions, weak and strong nuclear forces, decline very quickly with distance, and their effects are mainly confined to the subatomic scale.

It seems that there is more matter in the universe than antimatter, an asymmetry that may be related to CP destruction. This imbalance between matter and antimatter is partly responsible for the existence of all matter at the moment, because if the same amount of matter and antimatter were produced in the Great **, there would be an interaction that completely annihilated each other, leaving only photons.

The universe also does not seem to have either net momentum nor angular momentum, and if the universe is finite, it follows the accepted laws of physics. These laws are Gauss's laws.

Non-divergence pressure energy momentum pseudotensor.