A comet was recognized as returning
75–76 years
In 1705, astronomers recognized that repeated sightings were of the same comet, returning every 75–76 years. It was the first evidence that something besides a planet repeatedly orbited the Sun.
How Halley's Comet was recognized as a returning object
Ti piace? C’è un intero feed di cose così.
Sostituisci lo scroll vuoto con cose che vale la pena conoscere.
Scarica Hence gratis