It was last visible in our skies (clearly, with the naked eye) in 1986, with it's closest approach to the sun was on 9th February. It will next come by in 2061.
Halley's Comet's last appearance was in 1986, and its average period of revolution around the Sun is 76 years. But it turns out that the gravitational pull of the giant planets creates variations in...
sir Edmond Halley was the Astronomer/Mathematician who hypothesized that the great comets that had appeared at intervals of 73 to 77 years since ancient times were all the same object, and correctly...