Naked Universe of Ana
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How Do We Know That Dark Matter Makes Up 27%?
🕑 Added 2025-02-26 09:24:32 +0000 UTCWell I divided the post, bc it was toooo big this morning (oh no๐ฎโ๐จ, I joked even didn't realize I did it).
Next time I will show it with the Friedman equation.
Dark matter is not directly observable, but its influence can be measured through various astrophysical observations. The main methods confirming that dark matter constitutes about 27% of the total mass-energy of the universe include:
1. Cosmic Microwave Background (CMB)
2. Gravitational Lensing
3. Dynamics of Galaxies and Clusters
Today, Iโll focus on the first point, because otherwise, youโll die reading all of this. :)
Cosmic Microwave Background (CMB)
The CMB is light that has traveled freely since the early hot phase of the universe(of course, not as hot as i am, kidding). When the universe was only 380,000 years old (VERY hot MILF, forgive me, Christ), its temperature dropped enough for photons to stop scattering off free electrons and start traveling freely
through space(like independent women now, like me for example, haha). These photons now form the cosmic microwave background.
They detected small temperature fluctuations.
These fluctuations correspond to variations in density in the early universe. In other words, photons interacted differently with regions of varying density, leaving an imprint that can be detected today.
Ordinary matter creates shock waves, while dark matter provides additional gravitational pull, influencing the shape of these waves.
To determine how much dark matter exists in the universe, scientists analyze the intensity and frequency of these fluctuations. Usually scientists just compare theoretical models with observational data. If there is only ordinary matter - the structure of these fluctuations would be different.
Comments
Kinkyluberkin
Gorgeous
Faelor
This post was pretty big just the itself. ๐ญ
Pendolino70
When was the temperature of the Universe habitable because of the CMB? Like 20-100 degrees Celsius?
John
Okay, I wonโt! ๐ ๐๐น
Ana
And yes, I lied to you.....I did not post it yesterday...... Never trust me.....
