Exploring the Possibility of Discrete Spacetime in Cosmology and Cosmogony

In summary, cosmology is the study of the universe's origin, evolution, and structure, while cosmogony is specifically focused on the theories and explanations for how the universe began. The Big Bang theory is a scientific model that proposes the universe began as a singularity and has been expanding and cooling for billions of years. Dark matter and dark energy make up the majority of the universe and are responsible for its accelerating expansion. There are three main types of galaxies: spiral, elliptical, and irregular. The cosmic microwave background radiation is the oldest light in the universe and provides evidence for the Big Bang theory.
  • #1
Richo
2
1
Would general relativity (axiom: spacetime is continuous) still work if we changed the axiom to:
spacetime is discrete (but each individual chunk of it is so incredibly small* relative to a quark or gluon
that it makes no difference)?

*e.g. 3D's of Planck length, 1D of Planck time
 
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  • #2
I was advised to use a Homework forum. If this is inappropriate, please advise if you know the right forum for me to pose such questions.
As a senior in retirement, physics is my 'home work' but not my 'homework', sorry.
 

FAQ: Exploring the Possibility of Discrete Spacetime in Cosmology and Cosmogony

What is the difference between cosmology and cosmogony?

Cosmology is the study of the origin, evolution, and structure of the universe, while cosmogony is the study of the origin and development of the universe, specifically focusing on theories and explanations for how the universe began.

What is the Big Bang theory?

The Big Bang theory is a scientific model that explains the origin and evolution of the universe. It proposes that the universe began as a singularity, a single point of infinite density, and has been expanding and cooling over the course of billions of years.

What is dark matter and dark energy?

Dark matter and dark energy are two mysterious substances that make up the majority of the universe. Dark matter is an invisible and non-interacting form of matter that is thought to make up about 27% of the universe, while dark energy is a mysterious force that is thought to make up about 68% of the universe and is responsible for the accelerating expansion of the universe.

What are the different types of galaxies?

There are three main types of galaxies: spiral, elliptical, and irregular. Spiral galaxies have a distinct spiral structure and are typically larger, with more stars and gas. Elliptical galaxies are round or oval in shape and have less gas and dust compared to spiral galaxies. Irregular galaxies have no defined shape and typically have high rates of star formation.

What is the cosmic microwave background radiation?

Cosmic microwave background radiation (CMB) is a form of electromagnetic radiation that fills the entire universe. It is a remnant of the Big Bang and is the oldest light in the universe, dating back to about 380,000 years after the Big Bang. CMB provides evidence for the Big Bang theory and helps scientists understand the early stages of the universe's evolution.

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