How could all matter in the universe originate with the Big Bang?

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.

How can the universe be infinite if it was all concentrated into a point at the Big Bang?

Although space may have been concentrated into a single point at the Big Bang, it is equally possible that space was infinite at the Big Bang. In both scenarios the space was completely filled with matter which began to expand. There is no centre of the expansion, the universe is simply expanding at all points.

Does the amount of matter in the universe ever change?

Even if you’re only referring the “ordinary” matter (such as stars, gas, and bicycles) and dark matter, the mass of the observable Universe does increase, not because mass is being created, but because the size of the observable Universe increases.

What evidence supports the idea that the universe is expanding in all directions?

The spectral and temperature properties of distant light confirms that we live in expanding space. All of these pieces of evidence line up, teaching us that the Universe is expanding, and that’s the cause of the apparent recession, rather than any other explanation.

Is the amount of matter and energy in the universe constant?

The total amount of energy and matter in the Universe remains constant, merely changing from one form to another. The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed.

What do we know about the size of the universe?

Estimated mass (in kilograms) of the observable universe. Estimated total mass – energy (in Joules) of the observable universe. Estimate the total number of fundamental particles in the observable universe (other estimates go up to 10 85 ). Planck density, the density (in kg/meter 3) of the universe at one unit of Planck time after the Big Bang.

Did space and time exist before the Big Bang?

The statement that space and time did not exist prior to the Big Bang appears to present a logical impossibility, at least with respect to time. Any physical event implies change, and change presupposes — or would logically require — the existence of time. Or not?

How long has the universe been expanding?

All we are pretty confident about so far is that our universe has been expanding for many billions of years. When we extrapolate backward the entire part of the universe that we can observe today was converged to a single point around 14 billion years ago. Time is a concept that works great in our daily life but there are limits to it.

When did the universe converged to a single point?

When we extrapolate backward the entire part of the universe that we can observe today was converged to a single point around 14 billion years ago. Time is a concept that works great in our daily life but there are limits to it. Even here on earth GPS satellites would be off within a day without corrections from special and general relativity.