No planet has a perfectly circular orbit, though Venus has the least orbital eccentricity of any planet in our solar system.
An eliptical orbit. In theory a planet could also have a circular orbit, but no planet that we know of has a perfectly circular orbit, although some have a nearly circular orbit.
The greatest difference in seasons will occur on a planet that has a circular orbit. This is because winds are created this way.
Kepler discovered that the orbit of each planet is an ellipse rather than a perfect circle. The planet with an orbit that is closest to a circle is Venus.
Probably Venus, who's orbit varies only imperceptibly from a perfect circle. Venus's orbit is elliptical, but not so the average layman would notice (to astronomers, of course, it is quite different).
Mercury
An eliptical orbit. In theory a planet could also have a circular orbit, but no planet that we know of has a perfectly circular orbit, although some have a nearly circular orbit.
The greatest difference in seasons will occur on a planet that has a circular orbit. This is because winds are created this way.
Mercury.
No planet's orbit is a perfect circle. They are all ellipses.
No planet's orbit is perfectly circular. They are all elipses.
an orbit is the circular movement of a planet going round the sun, or a moon going round a planet. Gravitaional force is what creates the orbit.
Kepler discovered that the orbit of each planet is an ellipse rather than a perfect circle. The planet with an orbit that is closest to a circle is Venus.
earth
Probably Venus, who's orbit varies only imperceptibly from a perfect circle. Venus's orbit is elliptical, but not so the average layman would notice (to astronomers, of course, it is quite different).
With an open orbit, the object never returns. Examples would be a satellite in an unstable (open) orbit crashing down on Earth or a passing comet on a hyperbolic orbit which will leave our solar system (ejection loss). Closed orbits are the stable, planet-like orbits where objects return in a predictable manner.
An orbit.
Mercury