The eccentricity value measures how non-circular an orbit is. The planets in decreasing order of eccentricity with their approximate eccentricity values are:
# Pluto: 0.25 # Mercury: 0.21 # Mars: 0.093 # Saturn: 0.056 # Jupiter: 0.048 # Uranus: 0.047
# Earth: 0.017 # Neptune: 0.0086 # Venus: 0.0068
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.
Venus has the most nearly circular orbit of all the planets in our solar system. Its orbit has the least eccentricity, meaning it is closest to being a perfect circle.
Venus has the most circular orbit among the eight planets in our solar system. Its eccentricity, which measures how elongated an orbit is, is the closest to zero, making it almost circular.
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.
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.
Venus has the most nearly circular orbit of all the planets in our solar system. Its orbit has the least eccentricity, meaning it is closest to being a perfect circle.
All planets have at least some elongation or orbital eccentricity and thus not a perfectly circular orbit. Since Pluto was demoted from true planet status, Mercury is now the planet with highest eccentricity (of about 0.21)
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.
I'll assume you mean: "... as opposed to a circular orbit". That is caused by the fact that for a circular orbit, a planet needs a VERY PRECISE SPEED. Change the speed slightly (at a particular point in the orbit), and the orbit immediately becomes elliptical.
Venus has the most circular orbit among the eight planets in our solar system. Its eccentricity, which measures how elongated an orbit is, is the closest to zero, making it almost circular.
No planet's orbit is perfectly circular. They are all elipses.
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).
No, the greatest difference in seasons occurs on a planet with a more elliptical orbit, where the distance from the sun varies significantly. This leads to more extreme temperature changes and more pronounced seasons.
Venus has the least eccentric (most nearly circular) orbit of the eight in our solar system.