What happened to the energy after the Big Bang?

But as the universe quickly expanded, the energy of the Big Bang became more and more “diluted” in space, causing the universe to cool. About a billion years after the Big Bang, gravity caused these atoms to gather in huge clouds of gas, forming collections of stars known as galaxies.

What are 3 forms of evidence for the Big Bang?

Three key pieces of observational evidence lend support to the Big Bang theory: the measured abundances of elements, the observed expansion of space, and the discovery of the cosmic microwave background (CMB). The CMB refers to the uniform distribution of radiation that pervades the entire universe.

How is CMB evidence of the Big Bang?

The cosmic microwave background (CMB) is thought to be leftover radiation from the Big Bang, or the time when the universe began. As the theory goes, when the universe was born it underwent a rapid inflation and expansion. The CMB represents the heat left over from the Big Bang.

What is blue shifting?

The term “blueshift” refers to the shift in wavelengths of light toward the blue end of the spectrum as an object moves toward us in space. Astronomers use blueshift to understand motions of galaxies toward each other and toward our region of space.

What is red shifting?

‘Red shift’ is a key concept for astronomers. The term can be understood literally – the wavelength of the light is stretched, so the light is seen as ‘shifted’ towards the red part of the spectrum. Something similar happens to sound waves when a source of sound moves relative to an observer.

How does Red Shift prove the universe is expanding?

Astronomers have discovered that, in general, the further away a galaxy is, the more red-shifted its light is. This means that the further away the galaxies are, the faster they are moving. Red-shift data provides evidence that the Universe, including space itself, is expanding.

Will the big crunch happen?

The Universe might yet collapse in a devastating “big crunch”. Physicists have shown that even though its growth is speeding up, it could still start to implode by the time it is only twice its current age.

Is there another big bang on the way?

If we consider an FLRW universe the geometry is pretty straightforward. There was only one Big Bang, it happened everywhere at the same time, the universe is the same everywhere and it expands uniformly. So in a universe like this there is no danger that a universe from another Big Bang is heading our way.

Did the Big Bang expand the universe?

So the big bang is simply this expansion of the volume. It is not that the universe expanded (or exploded) in some existing space. The universe is the space and there is nothing beyond it. What if it is not like a ball, but actually does have an infinite volume.

Why doesn’t the universe expand into an empty space?

Because space itself is intimately connected with matter in the universe, as matter was created in the big bang, so was space. There is no ’empty space’ that the universe is expanding into.

What is the time limit of the Big Bang?

Strictly speaking the term Big Bang refers to the zero time limit of an FLRW universe. However theories of what the universe might be got more complicated when the theory of inflation was proposed, and in particular when eternal inflation was suggested.