The planets orbit the sun in an ellipse, like a squashed circle. The amount by which the ellipse is deformed by, from being a circle, is referred to as the eccentricity. An object with a highly eccentric orbit, such as a comet, will have a very elongated and stretched out orbit, its distance from the sun throughout its orbit will vary by a lot.
They are orbits and they are elliptical in shape. So the answer could be "orbits" or it could be "ellipses".
The eight major planets of our solar system all have three things in common: they are all in hydrostatic equilibrium (a sphere shape), they all orbit the Sun, and they all have clear paths around the sun without debris or smaller bodies nearby.
The motions of the Sun and the planets reflect to disk shape of the solar nebula because they follow the same rotation as this disk shape. The rotation of the Sun and the planets is not a perfect circle.
Planets remain almost perfectly spherical as they move around the sun. The paths they follow are ellipses, with the sun at one focus of each ellipse.
ellipitcal
Planets follow an eclipse shape when orbiting around the sun. Pluto had an irregular orbit and is no refereed to as a moon.
oval in shape.
They are orbits and they are elliptical in shape. So the answer could be "orbits" or it could be "ellipses".
The eight major planets of our solar system all have three things in common: they are all in hydrostatic equilibrium (a sphere shape), they all orbit the Sun, and they all have clear paths around the sun without debris or smaller bodies nearby.
The motions of the Sun and the planets reflect to disk shape of the solar nebula because they follow the same rotation as this disk shape. The rotation of the Sun and the planets is not a perfect circle.
Planets remain almost perfectly spherical as they move around the sun. The paths they follow are ellipses, with the sun at one focus of each ellipse.
elliptical
It must be near circular orbit obeying certain laws of celestial body rotation.
Planets are all spherical.
all planets have a circular shape
There are two planets with an almost perfectly spherical shape. They are Mercury and Venus.
17th century astronomer Johannes Kepler discovered the elliptical shape of the planets' orbits around the Sun, which he described in his first law of planetary motion. Newton later explained this in his law of universal gravitation.