It takes 75 years
Approximately every 76 years 1986 + 76 = 2062
Halleys comet comes back around every 76 years.
Probably because they were uninformed. Science has come a long way since then and we know Haleys Comet will probably never collide with Earth and end all life.
10000 years
Halley's Comet was first recorded in 240 BC by Chinese astronomers. However, it was Sir Edmund Halley who calculated its periodicity in 1705, predicting its return in 1758. The comet was then named after him.
It takes roughly 75 years for Halley's comet to come by the earth. All comets orbit the sun, but they do not all originate from the same place, which accounts for their paths and how long their individual orbit takes.
That is Halley's comet, named after English astronomer Edmond Halley,
76 years
No, a comet will NOT hit earth in 2012.
No, Halley's Comet was last visible from Earth in 1986 and is expected to return in 2061. It has an orbital period of about 76 years.
Probably several times. It is assumed that a third of Earth water came from comets and it was a comet that hit the Earth 65 million years ago and caused the dinosaur extinction.
Halley's Comet