Pluto
Thanks for the answer! Unfortunately I meant to restrict the question to the 5 planets visible with the unaided-eye. Mercury, Venus, Mar, Jupiter & Saturn (excluding Earth). My mistake. Then again, perhaps its the planet furthest from the sun would have the greatest deviance from a perfect circular orbit. In that case, of the classical 5, it might be Saturn.
They least resemble rocky planets like Venus Earth and Mars, particularly they least resemble planets that we would consider as possible life sustaining planets.
The earth's orbit is almost a circle, but not quite. It is elliptical, but the difference between the closest and farthest points is less than 4%. This is such a small difference that it would look like a circle to most people. Astronomy books often show misleadingly exagerated elliptical orbits.
To answer the question very literally: Yes. The Galilean satellites follow the same pattern of density versus increasing distance from Jupiter that the planets' density follows versus distance from the sun. The specific pattern is: No pattern at all. Earth ... 3rd from the sun ... is the most dense planet, while Saturn ... 6th planet from the sun ... is the least dense. So there is no "just as" to compare to.
Most known extrasolar planets least resemble Earth, both in terms of size and distance from their parent stars. Gas giants, hot Jupiters, and super-Earths are more common than small, rocky planets like Earth among the exoplanets discovered so far.
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
Venus has the least elliptical orbit of all the planets in our solar system. Its orbit is nearly circular, with an eccentricity of only about 0.007, meaning it deviates very little from a perfect circle. This results in minimal variation in its distance from the Sun throughout its orbit.
The two planets with the least distance between them are Venus and Earth. Their average distance can be as short as about 38 million kilometers (24 million miles) when they are aligned on the same side of the Sun. This close proximity occurs during a phenomenon called inferior conjunction, making them the nearest planets to each other at certain times in their orbits.
urn
All planets have an elliptical orbit and the planets do not cross paths. They are all at least 15,000 miles around. They all have atmospheres. They all have their own gravity. They all have cores.
There are at least 15 billion elliptical galaxies in the universe.
Neptune, Uranus, Saturn, Jupiter, Mars, Earth, Venus, and Mercury
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, in order from least to greatest in distance from the sun.
I think the least common is elliptical or irregular..
Mercury's orbit looks the least like a circle compared to other planets in our solar system. Its highly elliptical orbit is the most elongated, meaning it is more stretched out and not as round as other planets' orbits.
Planets don't have circular orbits; all orbits are ellipses. A circle has one center, but an ellipse has two focuses, or "foci". The further apart the foci, the greater the eccentricity, which is a measure of how far off circular the ellipse is. Venus has the lowest eccentricity, at 0.007. Neptune is next with an eccentricity of 0.011. (Earth's orbit has an eccentricity of 0.017.) So, Venus has the shortest focus-to-focus distance.
The least distance is across the Strait of Gibraltar.
Mercury travels the least distance to go around the Sun once, as it has the shortest orbital path of all the planets in our solar system.