I lettori chiedono: A Universe From No?

Can something be created from nothing?

So particle-antiparticle pairs can be created from “nothing”, that is from no particles to two particles, but energy must be provided, so these particles can be viewed as having been created from the energy.

Is the universe eternal?

While the universe is evolving, there is no beginning and no end – the universe exists forever. The early state of inflation is described in two different, but equivalent pictures. In the freeze frame the universe emerges from an almost static state with flat geometry.

What created the universe?

Our universe began with an explosion of space itself – the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.

Does the universe have a beginning?

The usual story of the Universe has a beginning, middle, and an end. It began with the Big Bang 13.8 billion years ago when the Universe was tiny, hot, and dense. The universe carried on expanding and cooling, but at a fraction of the initial rate.

How many universes are there?

There are still some scientists who would say, hogwash. The only meaningful answer to the question of how many universes there are is one, only one universe.

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Where did all matter come from?

Origins. In the first moments after the Big Bang, the universe was extremely hot and dense. As the universe cooled, conditions became just right to give rise to the building blocks of matter – the quarks and electrons of which we are all made.

Does the universe end?

It never ends, but it’s also constantly expanding. Scientists don’t think there is a true edge of the universe. This is called the edge of the observable universe. It’s the farthest we can see, based on how we get information from light.

Will the universe last forever?

Confirmation of the Big Bang mostly depends on knowing the rate of expansion, average density of matter, and the physical properties of the mass–energy in the universe. There is a strong consensus among cosmologists that the shape of the universe is considered “flat” and will continue to expand forever.

What is the universe inside of?

The Universe is thought to consist of three types of substance: normal matter, ‘dark matter’ and ‘dark energy’. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.

What is beyond the universe?

The universe, being all there is, is infinitely big and has no edge, so there’s no outside to even talk about. Oh, sure, there’s an outside to our observable patch of the universe. The cosmos is only so old, and light only travels so fast. The current width of the observable universe is about 90 billion light-years.

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How is space created?

During the Big Bang, all of the space, time, matter, and energy in the Universe was created. This giant explosion hurled matter in all directions and caused space itself to expand. As the Universe cooled, the material in it combined to form galaxies, stars, and planets.

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