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Any object in a central inverse-square force-field, like the Sun's gravity, must take up an elliptical orbit that follows Kepler's laws. This was shown to be true by Isaac newton in the 17th century using his law of gravity, laws of motion and differential calculus.
The planets all have orbits that are technically elliptical but with only a small amount of eccentricity, so that the orbits look very nearly circular with the Sun off-centre by a distance equal to the average distance times the eccentricity.
This is why it took 2000 years for mankind to discover elliptical orbits, because the previous model of circles and epicycles gave very good predictions of the planets' positions, until the late 16th century when Tycho Brahe came up with very accurate measuring techniques that showed the flaws in the old model and allowed Kepler to make his discovery.
What else can I help you with?
Do comets orbit around the sun just like planets?
Yes, they do. But their orbits are highly eccentric. That means that their orbit first takes them very close to the Sun and then very far away, making the orbit very elongated. Also, all the planets orbit the Sun in more-or-less the same plane. ie, All the orbits are in line (Picture a disc). The orbit of most comets, on the other hand, are not in the same plane. Check the images in the related links for a better idea on their orbits.
Why does it take the pouter planets so long to orbit the sun?
The outer planets take longer to orbit the Sun, because they are farther away from the Sun. It make its gravitational pull weaker to the farther planets. That means that the outer planets take longer to orbit the Sun.
Why is the motion of a planet compared to the motion of a comet?
Both planets and comets in our Solar system share the same thing. The fact that they orbit Sol our local star. The planets orbit in a regular timely fashion in elliptical orbits that keep them about the same distance from the sun all the time. A comet has an elliptical orbit that takes it way out in our system and then it falls back in and comes close to the sun before heading back out again.
What is a moon and how does it move around the solar system?
Moons are approximately spherical objects which orbit planets and are smaller than the planets that they orbit, although they are still relatively large objects (so an orbiting dust particle does not qualify as a moon). Since moons orbit planets, their motion around the solar system is controlled by the planets that they orbit; planets orbit the sun, and planets take their moons with them.
Is it true that all the planets in the solar system revolve around the sun?
yes and the sun revolves around some thing bigger
What is the shape of the orbit that the planets take called?
Elliptical Orbit
What shape does an orbit take?
It varies from planet to planet. But most planets including our own, orbit the star in an elliptical motion.
Do comets orbit around the sun just like planets?
Yes, they do. But their orbits are highly eccentric. That means that their orbit first takes them very close to the Sun and then very far away, making the orbit very elongated. Also, all the planets orbit the Sun in more-or-less the same plane. ie, All the orbits are in line (Picture a disc). The orbit of most comets, on the other hand, are not in the same plane. Check the images in the related links for a better idea on their orbits.
Why does it take the pouter planets so long to orbit the sun?
The outer planets take longer to orbit the Sun, because they are farther away from the Sun. It make its gravitational pull weaker to the farther planets. That means that the outer planets take longer to orbit the Sun.
What path does the orbit take?
Most planetary orbits are elliptical.
Why is planet's orbit elliptical in shape?
Because that's the way gravity works. If you take Newton's formula for the forceof gravity, and you have enough geometry and calculus, you can massage theformula around and derive Kepler's three laws of planetary motion. His first lawsays that planets move in ellipses with the sun at one focus. Kepler got that fromTycho's notebooks, where he wrote down the results of years and years of watchingand measuring the positions of the planets. Kepler showed that the ellipse was thebest fit to what Tycho actually saw happening in the sky. Then 100 years later, Newtoncame along and showed, with one simple formula to describe gravity, why orbits mustbe ellipses.
Why is the motion of a planet compared to the motion of a comet?
Both planets and comets in our Solar system share the same thing. The fact that they orbit Sol our local star. The planets orbit in a regular timely fashion in elliptical orbits that keep them about the same distance from the sun all the time. A comet has an elliptical orbit that takes it way out in our system and then it falls back in and comes close to the sun before heading back out again.
How many steps did the eight planets take to finished around the orbit?
Planets do not take steps. Each planet has its own orbit and is is different.
What is the name of the path that the planets take?
ORBIT
The speed of a planet in its elliptical orbit around the sun?
The path that planets take around the sun is called it's orbit. The gravitation pull of the sun keeps each planet in it's orbit. Each planets orbit varies in the time it takes to make one trip around the sun.
Objects that orbit the sun?
Planets, exoplanets, asteroids. They're all sattelites of the sun.
What is a moon and how does it move around the solar system?
Moons are approximately spherical objects which orbit planets and are smaller than the planets that they orbit, although they are still relatively large objects (so an orbiting dust particle does not qualify as a moon). Since moons orbit planets, their motion around the solar system is controlled by the planets that they orbit; planets orbit the sun, and planets take their moons with them.
