because the comet can't stay in the suns pull and the Earth pulls it for a short time
Any comet visible from earth is in orbit around the sun. If the orbit is closed (elliptical), the comet will return after some period of time. If the orbit is open (parabolic or hyperbolic), the comet will escape the solar system and never return to the neighborhood.
It is called an orbit. A comet has an eccentric or parabolic orbit.
The comet is kept in orbit around the sun by the gravitational pull between the comet and the sun. This gravitational force acts as a centripetal force, keeping the comet moving in its elliptical orbit.
Halley's Comet appears roughly every 76 years. It was last visible from Earth in 1986 and is projected to next be visible in 2061. The comet can be seen from various locations on Earth, depending on its orbit and visibility during its return.
The path of a comet around the sun would depend on its mass, speed, and trajectory. It a comet enters the sun's gravitational field at the correct trajectory and speed, it would fall into a roughly circular orbit.
Any comet visible from earth is in orbit around the sun. If the orbit is closed (elliptical), the comet will return after some period of time. If the orbit is open (parabolic or hyperbolic), the comet will escape the solar system and never return to the neighborhood.
It is called an orbit. A comet has an eccentric or parabolic orbit.
An orbit
Halley's Comet is following its long orbital path. It is currently a little past the orbit of Neptune, and is not visible.
The comet is kept in orbit around the sun by the gravitational pull between the comet and the sun. This gravitational force acts as a centripetal force, keeping the comet moving in its elliptical orbit.
oval
An orbit
The Sun
oval
Halley's Comet returns to the part of its orbit visible from Earth.
Halley's Comet appears roughly every 76 years. It was last visible from Earth in 1986 and is projected to next be visible in 2061. The comet can be seen from various locations on Earth, depending on its orbit and visibility during its return.
Invisible to our eyes, ionic "winds" are constantly blowing away from the sun. As a comet passes in a long, elliptical orbit, its tail is pushed away from the sun by these solar winds. Since most of the visible part of the comet is its tail, this is a very visible effect. Of course, there is no air resistance in the vacuum of outer space, a comet's orbit will not make it more elongated, smooth, etc.