Yes, none of the planets in our solar system have exactly circular orbits, though some are more eccentric than others.
All planets have elliptical orbits.
No, because all planets known have elliptical orbits.
No, not all planets have elliptical orbits. While most planets in our solar system have nearly circular orbits, some planets, like Mercury and Pluto, have more elliptical orbits. Additionally, exoplanets outside our solar system can have a variety of orbital shapes.
All the planets move with an elliptical orbit, but with a very low eccentricity.
Elliptical orbits of the planets around the sun actually match what we observe. Newton's Theory of Universal Gravitation states that planets will move around the sun in elliptical orbits.
All planets in our solar system have elliptical orbits.
Yes, according to Kepler's laws of planetary motion, the orbit of each planet around the Sun is an ellipse with the Sun at one of the two foci. This means that the planet's distance from the Sun varies throughout its orbit.
Planets travel in elliptical orbits.
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.
I don't know what "elliptical planet" is supposed to mean, but by any reasonable definition I can think of, no, all planets are "elliptical planets".
Johannes Kepler.
Planets move around the sun in elliptical orbits. These orbits are elongated and follow Kepler's laws of planetary motion, which describe the shape and dynamics of the planetary orbits.