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Yes, every closed orbit is an ellipse. Circles are "perfect" ellipses, but no natural orbit could be perfectly circular.

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Who was Person who first showed that planetary orbits are ellipses?

Johannes Kepler was the person who first showed that planetary orbits are ellipses. His work, published in 1609, is known as Kepler's first law of planetary motion.


What is the difference between Copernicus and Kepler description of planetary orbits?

Kepler realised the planets orbits are not circles; they are ellipses.


One of the discoveries that led to the modern view of the Solar System was that the BLANK of the planets were ellipses?

One of the discoveries that led to the modern view of the Solar System was that the orbits of the planets were ellipses. This was one of the key contributions from Johannes Kepler's laws of planetary motion, which replaced the earlier belief that planetary orbits were perfect circles.


How did Kepler expand on Copernicus' ideas?

Kepler showed that planetary orbits were actually ellipses, not circles as proposed by Copernicus.


Kepler showed that the orbits of the planets are?

Kepler showed that the orbits of the planets are elliptical, with the Sun at one of the focal points. This discovery led to his laws of planetary motion, which describe how planets move in their orbits.


What shape are most planets' orbits around the sun in specific the earth?

The shape of most planets' orbits around the sun, including Earth, is elliptical. This means that their orbits are not perfect circles but rather slightly elongated with the sun positioned at one of the foci of the ellipse.


What are ellipses?

Ellipses are a scientific word for the shape of an oval. for example the planets orbits are ellipses.


What is the shape of asteroids orbit?

All closed gravitational orbits are ellipses.


What is the shape of the orbit a comet has?

The orbits of periodic comets and the orbits of planets have the same geometric shape.Every closed gravitational orbit is an ellipse. But the eccentricity of the cometary ellipsesare almost all greater than the eccentricities of the planetary ones.


What of the planets are ellipses?

their orbits


Who said the planets traveled in oval orbits?

Everyone from the ancient Greeks on knew that the planets move in oval-type orbits, which were simulated by systems of circles. Later, after years of hard work, Johannes Kepler published the laws of planetary motion in 1618 which showed that the orbits are more accurately represented by ellipses, and each planet has its own ellipse with the Sun at one focus. Ellipses make very good approximations to the actual orbits of planets, but the gravitational effects of the other planets, especially Jupiter, mean that the planets depart slightly from true elliptical orbits. That is taken care of by regular updates to the orbital elements of the planets, which are numbers which describe the sizes and shapes, orientation and inclination of all the planets' elliptical orbits.


Earth's orbit is not a circle is it?

No, all orbits are ellipses. That includes the Earth's orbit.