Unlocking the Mystery of the Universe's Origin

In summary, the idea that the universe was once a small point is based on the redshift and the concept of an expanding universe. This line of reasoning leads to the idea of a singularity, where the universe becomes too small for our current physics to explain. However, questioning the exact size of the universe is only relevant to string theorists or particle astrophysicists.
  • #1
munky99999
202
0
why the Universe was at a small point? Is this point like super small like.

Plank length
Googelplex^googelplex

Or just any size smaller then Planck Length? To be undefinable.

Why couldn't the universe just all of a sudden be created right where it is, in all the same motions as everything is in.
 
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  • #2
Im sorry i don't understand want you point is.
regards
jamie
 
  • #3
The main reasoning behind the idea that the universe was once a small point is based on the redshift. The shifting of light toward the red end of the spectrum is taken by most coamologists to mean that the stars emitting this light are moving away from us. The more distant a star is, the more red-shifted its light; meaning that the more distant stars are moving away faster. This produces the image of a universe that is expanding. If the universe is exanding, then it is bigger today than it was yesterday. Therefore, it was smaller yesterday than it is today, and the day before yesterday it was smaller still.

If this line of reasoning is taken back far enough, we get to a point when the universe was very very small.
 
  • #4
Till you get to a point where the universe ends up being so small that the physics we have is inadequate to explain it. Such a state is referred to as a singularity.

To actually question the scale of size is meaningless unless you are a string theorist or particle astrophysicist.
 

1. What is the Big Bang theory and how does it explain the universe's origin?

The Big Bang theory is the prevailing scientific explanation for the origin of the universe. It proposes that approximately 13.8 billion years ago, the universe began as a singularity - a point of infinite density and temperature. This singularity then expanded rapidly in an event known as the Big Bang, creating the universe as we know it today. The theory is supported by evidence such as the cosmic microwave background radiation and the observed expansion of the universe.

2. What existed before the Big Bang?

The concept of time and space as we know it did not exist before the Big Bang. The singularity that began the universe was not located in any specific point in space, but rather it created space and time as it expanded. Therefore, it is not possible to determine what existed before the Big Bang, as our current understanding of the universe breaks down at this point.

3. How do scientists study the universe's origin?

Scientists use a variety of tools and techniques to study the universe's origin. These include astronomical observations using telescopes and satellites, experiments in particle accelerators, and theoretical models and simulations. By combining data from these different sources, scientists can piece together a comprehensive understanding of the universe's origin.

4. Has the Big Bang theory been proven?

The Big Bang theory is supported by a vast amount of observational and experimental evidence. However, like all scientific theories, it is constantly being refined and updated as new evidence becomes available. While it has not been definitively proven, the Big Bang theory is the most widely accepted and well-supported explanation for the universe's origin.

5. What are some current areas of research in understanding the universe's origin?

Scientists are currently researching various aspects of the Big Bang theory, such as the nature of dark matter and dark energy, the possibility of multiple universes, and the conditions of the very early universe. Other areas of research include studying the cosmic microwave background radiation for clues about the universe's infancy, exploring the properties of black holes and their role in galaxy formation, and investigating the role of quantum mechanics in the origin of the universe.

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