Why the universe is finite?

The observable universe is finite in that it hasn’t existed forever. It extends 46 billion light years in every direction from us. (While our universe is 13.8 billion years old, the observable universe reaches further since the universe is expanding). The observable universe is centred on us.

Is there a finite number of atoms in the universe?

But on the cosmic scale of the universe, we can assume that the amount of matter created and uncreated cancel each other out. This means matter is finite, so there are the same number of atoms in the observable universe as there always have been, according to Scientific American.

What does it mean to say the universe has a finite size?

A finite universe is a bounded metric space, where there is some distance d such that all points are within distance d of each other. The smallest such d is called the diameter of the universe, in which case the universe has a well-defined “volume” or “scale.”

How is it possible that the universe is infinite?

If the universe is perfectly geometrically flat, then it can be infinite. If it’s curved, like Earth’s surface, then it has finite volume. Current observations and measurements of the curvature of the universe indicate that it is almost perfectly flat. You might think this means the universe is infinite.

When did the universe become infinite?

13.8 billion years ago
That’s because we know the universe isn’t infinitely old — we know the Big Bang occurred some 13.8 billion years ago.

What happens to the number of atoms in the universe over time?

the total number of atoms is decreasing, but only because at this epoch fusion is outpacing radioactive decay as the dominant nuclear process in the universe.

How many atoms exist in the world?

133,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000
According to the US Department of Energy’s Jefferson Lab, the answer is: 133,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000. That answer comes from an estimation of the number of atoms in each of Earth’s elements, like Iron, Oxygen, Silicon, Magnesium, Sulfur … etc.

Can something finite become infinite?

“An actual infinite cannot exist.” “An infinite temporal regress of events is an actual infinite.” “Thus the temporal series of past events cannot be an actual infinite.” The first statement states, correctly, that a finite (number) cannot be made into an infinite one by the finite addition of more finite numbers.

Can a closed universe be infinite?

This doesn’t necessarily mean the Universe is infinite, just that if it isn’t, it also has to be curved! General Relativity actually allows for three possibilities: A finite unbounded universe — called a ‘closed’ universe. An infinite curved universe — called an ‘open’ universe.

How many atoms are there in the universe?

We will find the number of atoms in the universe by multiplying the number of atoms in our galaxy by the number of galaxies in the universe. The total number of atoms in the universe then comes to… 10 78! Another way to do this calculation is by calculating the mass of the universe.

How many particles are there in the observable universe?

Therefore the observable universe is defined as only the parts of the universe that are within 13.7 billion light years of us. The commonly accepted answer for the number of particles in the observable universe is 10 80. This number would include the total of the number of protons, neutrons, neutrinos and electrons.

Is the universe finite or infinite?

Although the general theoretical description of the Universe is given by Friedmann–Lemaître–Robertson–Walker metric, and although it allows the Universe to be both finite (closed) and infinite (opened), scientific observation has shown that the universe began a finite period ago (approximately 13.798 Billion years ago).

Is the universe flat or flat?

The universe appears (exactly) flat, and for simplicity the universe is infinite. Note that we distinguish between the observable universe (which is the local patch that light could have travelled between since the Big Bang) and the totality — we have constraints that even if the universe is not infinite,…