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S8 Tension
May 14 , 2025
15 hrs 0 min
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- Cosmologists use the term Sigma 8, or S8, to quantify the matter around us.
- This matter is made up of baryonic particles, such as protons and neutrons, that bunch up in different regions of space.
- The value of S8 is calculated by studying various regions of the universe.
- Each region is defined by an astronomical length scale of approximately 26 million light-years.
- A higher value for S8 indicates more clustering with a greater amount of matter clumped together.
- The lower value indicates a more uniform distribution of matter.
- The 'S8 tension' arises from different measurement methods producing varying S8 estimates.
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