None of the planets orbit the sun perfectly in a circle, there is a degree of deviation from this perfect circle called eccentricity. The higher the eccentricity (more more the eccentric the orbit is) the further away from this perfect circle the orbit is.
The planet that deviates most from a perfect circle, having the highest eccentricity, is Neptune. Neptune also has the highest axial tilt, tilted over onto its side as it orbits the sun.
Our day is based on the Earth's rotation, that is most people say it is 24 hours. If you want to get technical it takes 23 hours, 56 minutes, and 4.2 seconds.
no, comets do not orbit Earth. If comets did orbit Earth, it would be Earths Moon's, but comets orbit the kuiper belt at the edge of the Solar System. Some times comets hit each other and get knocked out of their orbit and possibly hit a planet.
23.5º23.5 Degrees is most believed but it changes from 21 to 25.
'Counter-clockwise' requires a reference point such that we can determine which side of the galactic plane one is on to look at the direction of spin. That said, the planets do all orbit in the same direction. Additionally, Venus, Uranus and the Plutoid all spin in different directions than the other planets, which spin the same way as their orbits. Venus spins in the exact opposite direction (retrograde), Uranus has its axis of spin on the galactic plane, and the Plutoid's axis is inclined 123 degrees to its plane of orbit, making its spin retrograde as well.
pluto... :)
The planet with the most elliptical orbit is Mercury. Second is Mars.
Yes.
As an elliptical orbit is any orbit that isn't perfectly circular, everything has an elliptical orbit. The planets Mercury and Pluto have the most elliptical orbits of the planets, and are easily seen to be oval shaped. Comets also have highly elliptical orbits.
Mars, and all the other planets, have oval-shaped, or eliptical, orbits.
Neptune orbits the Sun (as do most planets) with an elliptical orbit. When the orbit takes the planet closest to the Sun it is moving faster than when it is furthest from the Sun when on an elliptical orbit.
It varies from planet to planet. But most planets including our own, orbit the star in an elliptical motion.
The SHAPE of the orbit the Earth and most planets and other bodies of mass in space are usually elliptical.
Mars has the most elliptical orbit. The earth's is almost a perfect circle
Pluto has the most oblique orbit. All the planets have elliptical orbits, however Mercury has the most elliptical orbit since Pluto is now considered a dwarf planet. This information is provided by the Royal Astronomical Society of Canada and available online [see related links].
According to Keplers first law of 1618 which has not been repealed yet, the planets each move in an elliptical orbit with the Sun occupying one focus. The shape of an ellipse is described by the eccentricity. For low eccentricity such as the planets' orbits have, the orbit is very close to being a circle but the most significant difference is that the Sun is off-centre.
Oort cloud comets
740,573,600 km at its closest, and 816,520,800 km at its furthest point - like most of the planets, it follows an elliptical orbit.