Curated category
Moons
- Natural satelliteJohannes Kepler published a pamphlet in 1610 titled Narratio de Observatis a se quatuor Iouis satellitibus erronous. He derived the word satellite from the…
- MoonFour point five one billion years ago, a Mars-sized body named Theia collided with the proto-Earth. This oblique impact blasted material into orbit about our…
- Minor-planet moonAstronomers classify a natural satellite orbiting a minor planet as a minor-planet moon. As of the latest counts, 457 minor planets are known or suspected to…