Dark Matter

Dark matter For centuries, physicists and philosophers want to know what constitutes our universe. Aristotle believes that all substances have one of four forms of earth, air, fire and water. Since then, there has been a long way to discover atoms and elementary particles. We can also infer the reason why protons and neutrons were formed. Since then, we have discovered and predicted the presence of non-atomic particles, such as photons, neutrinos, axes, and many other particles.

Myth: There were only two substances, dark matter and light matter. Dark matter consists of all evils in the Galaxy and Matter is made up of all good things in the world. One day, a lot of dark matter began to shake. Four years later, the dark matter spot swayed greatly, the first god was born, not a baryon, but a dark god was born. Therefore, GOD OF TIME GOTTFRIED was born. As this is not a new accent, of course, like anyone, he will crash into Gottfried. There was the first star there, so the two gods flew.

Hot Dark Matter (HDM): Dark matter that moves at a speed close to the speed of light after the big bang 10,000 years ago. An example of a hot dark matter candidate is a huge neutrino. HDM first creates large scale structures (super clusters, clusters), which are divided into individual galaxies. Enlargement: The big bang model which had a large cosmic constant in the early days of the Big Bang (about t = 10 - 35 seconds) caused a rapid acceleration of the universe, followed by a normal big bang model with slowed expansion .

Cold Dark Matter (CDM): Dark matter moves at a much slower speed than the light speed of 10,000 years after the Big Bang. CDM exists as foreign matter, interaction with radiation and baryon is weak. The clean development mechanism first forms galaxies and organizes the substances into smaller units. Clusters and supercluster will be formed later. Cosmic constant: A term working with opposite gravity in Einstein's general relativity equation. Einstein used it to force the existence of the static universe. It is usually expressed in Lambda, an uppercase Greek letter, and is expressed as the square of the inverse length. Alternatively, it is expressed in lowercase letters in Greek lambda (if normalized with critical density).