Curated category
Galaxies
- Black holeIn 1784, John Michell published a letter suggesting that some stars could be so massive and dense that light would never escape their gravity.
- GalaxyThe word galaxy comes from the Greek term for milky, a direct reference to the Milky Way band visible in our night sky. Early astronomers like Democritus…
- Galactic haloA galactic halo is an extended, roughly spherical component of a galaxy which extends beyond the main, visible component.