This map of dark matter (tinted blue) in the massive galaxy cluster Abell 1689 was created by inferring the invisible matter's location and mass based on the degree of gravitational lensing Abell 1689 produces.
Credit: NASA, ESA, and D. Coe (NASA JPL/Caltech and STScI)
Simple, atypical but neat estimation of energy released in fission
1 week ago in The Curious Wavefunction