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โญ Stars & Galaxies
Dark Matter & Energy
The great mystery: 95% of the universe is invisible dark matter and dark energy that we cannot detect
Universe ๐ 1933 Stars & Galaxies
Key Facts
- 1
Ordinary matter (stars, planets, gas) = only 5% of the universe; dark matter = 27%; dark energy = 68%
- 2
Dark matter: inferred from gravitational effects (galaxies spin too fast); never directly detected despite decades of searching
- 3
Dark energy: discovered 1998 by Saul Perlmutter et al. (Nobel 2011); causes the universe's expansion to accelerate
๐ Did you know? "The most incomprehensible thing about the universe is that it is comprehensible" โ Albert Einstein
Quick Reference
Category
Stars & Galaxies
Region
๐ Universe
Year / Era
1933
About
The great mystery: 95% of the universe is invisible dark matter and dark energy that we cannot detect