Uniform Distribution of Stars
The hypothesis that matter in the universe is distributed evenly on large scales. This concept is central to the Cosmological Principle, which assumes homogeneity and isotropy.
Key Implications
- Olbers’ Paradox: If the universe were infinitely old, infinitely large, and uniformly filled with stars, the night sky should be as bright as the surface of a star. The observed darkness of the night sky contradicts this static, infinite model.
- Resolution: The paradox is resolved by recognizing that the universe has a finite age and is expanding, limiting the observable volume and redshifting light from distant sources.
- Statistical Homogeneity: On scales larger than ~300 million light-years, the distribution of galaxies and clusters approximates uniformity, though local structures (clusters, voids) exist.
Related Concepts
- Cosmological Principle
- Observable Universe
- Expansion of the Universe
- Redshift