Orbital Speed of Planets in Order. The truth is that for 7 out of the 8 planets the SS's orbits are very nearly circular. The four inner planets (Mercury, Venus, Earth and Mars) are in the tiny disk in the center, inside of Jupiter's orbit.
The picture below shows the planets in their orbits on the orbital plane.

Two planets don't do a great job of occupying the same exact orbit, however, because there's no such thing as true stability in these cases. A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit. All 8 planets in our solar system seem to orbit in roughly the same plane (give or take a few degrees). For many years, he struggled to make Brahe’s observations of the motions of Mars match up with a circular orbit. The sun and planets are believed to have formed out of this disk, which is why, today, the planets still orbit in a single plane around our sun.

You have to look carefully to see our home. In effect, the first law describes the shape of a planet's orbit, the second says how a planet's speed varies at each point on its orbit, and the … Dwarf planets as 'plutoids' Pluto, Eris, Haumea and Makemake are all known as "plutoids," unlike the asteroidal dwarf planetoid Ceres.A plutoid is a dwarf planet with an orbit … In the time it takes the Earth to complete one orbit, the planets closer to the Sun (Mercury and Venus) orbit at least once. It is an ellipse—a “flattened” circle. Its orbital path doesn't lie in the same plane as the eight planets, but is inclined at an angle of 17°. Orbit Lengths. The best you can do is hope for a quasi-stable orbit. The quantity P 2 /a 3, where P is a planet's orbital period and a is its average distance from the Sun, is the same for all planets. A drawing depicting the flat plane of our solar system. Here is a list of all extrasolar planets … Mercury's, Pluto's and Sedna's orbits are more elliptical.

Why don't they just orbit whichever way they want? Like many philosophers of his era, Kepler had a mystical belief that the circle was the Universe’s perfect shape, and that as a manifestation of Divine order, the planets’ orbits must be circular. Its orbit is also more oval-shaped, or elliptical, than those of the planets. The Sun (or the center of the planet) occupies one focus of the ellipse. This is because of the gravitational force being exerted on the planets by the sun. A focus is one of the two internal points that help determine the shape of an ellipse. Additionally, according to Kepler’s laws of planetary motion, the flight path of every planet is in the shape …

The orbital speeds of the planets vary depending on their distance from the sun. The orbit of a planet around the Sun (or of a satellite around a planet) is not a perfect circle.
The more distant planets (Mars, Jupiter, Saturn, Uranus and Neptune) which move slower and have a greater distance to travel, complete just a fraction of their orbits in this time. Internal structure. ... about Earth's orbit, ... formed within about 200 million years after the planet took shape. It takes 248 Earth years for Pluto to complete one orbit around the Sun. Earth is the fifth largest of the planets in the solar system.