75 - 76 year to orbit the sun .
Halley's Comet does not rotate, but perhaps you mean revolve, as in how long it takes to revolve around the sun.If that is what you mean, then the revolutionary period of Halley's Comet is about 75-76 earth years.
Halley's Comet orbits the sun, not the earth, roughly every 76 years.
Halley's Comet has an orbital period of about 76 years. It is one of the most famous comets and can be seen from Earth approximately every 76 years.
The period of revolution of comet Halley is approximately 76 years. This means that it takes about 76 years for the comet to complete one orbit around the Sun.
Halley's comet
Halley's Comet takes 73.5 years to orbit the sun but every comet is different just like planets.
It takes some 75 to 76 years for Halley's Comet to orbit the sun. It last appeared in the inner Solar System in 1986, and will next appear in mid 2061. A link is provided to the Wikipedia article on Comet Halley.
Halley's comet orbits the Sun. It follows a highly elliptical path that takes it from the outer solar system, where it interacts with the gravitational forces of the giant planets, back towards the inner solar system, passing close to the Sun.
Halley's Comet takes about 76 years to complete one orbit around the Sun. It was last seen in the inner Solar System in 1986 and is predicted to return in 2061.
It takes Halley's Comet 74 to 76 earth years to complete an orbit of the Sun. It can be influenced by passing the large outer planets, so its revolutions are not always the same duration.
For the Earth, it takes 365 days to revolve around the Sun.
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.