The best comets this century

The best comets this century

Comets are small, roundish bodies made of dust grains mixed with ice. Most travel along elliptical orbits that occasionally bring them close to the Sun. The main icy body of the comet is its nucleus. It’s small, generally less than 6 miles (10 kilometers) in diameter. When far from the Sun, comets appear faint becauseContinue reading "The best comets this century" The post The best comets this century appeared first on Astronomy Magazine.