Olbers' paradox
Olbers' paradox
Argument in astrophysics against the theory of an unchanging universe.
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Readers' pathsAug 2026 – Oct 2026
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Horizon problem
Cosmological fine-tuning problem.
9.3%
Cosmic microwave background
Trace radiation from the early universe.
8.5%
Heinrich Wilhelm Matthias Olbers
German astronomer (1758–1840).
7.7%
Static universe
Cosmological model in which the universe does not expand.
6.5%
Redshift
Change in wavelength of light.
6.4%
Bentley's paradox
Cosmological paradox involving gravity.
4.4%
Oberth effect
Type of spacecraft maneuver.
4%
Lambda-CDM model
Mathematical model of the Big Bang.
2.7%
Expansion of the universe
Increase in distance between parts of the universe.
2.3%
Steady-state model
Model of the universe – alternative to the Big Bang model.
2.2%
Readers come from
Share of the 3,072 readers arriving from another article
Edgar Allan Poe
American writer and critic (1809–1849).
19%
Thomas Digges
English mathematician and astronomer (died 1595).
9.9%
Outer space
Void between celestial bodies.
6.5%
Benoit Mandelbrot
French-American mathematician (1924–2010).
3.6%
Heinrich Wilhelm Matthias Olbers
German astronomer (1758–1840).
3.1%
Hubble's law
Observation in physical cosmology.
3%
Black
Darkest color.
2.8%
Oberth effect
Type of spacecraft maneuver.
2.8%
Cosmology
Study of the universe.
2.6%
Night
Period of darkness.
1.9%