oblate spheroid
The ellipse is, with the sun at one focus of each planetary orbit.
Planetary orbits are eliptical. Each orbit forms an elipse.
They don't because their different in size, shape, and color
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.
A circle but Pluto (which is not considered a planet currently) makes an oval shape.
The inner planets have a spherical shape. In fact all planets are more or less spherical.
Spherical
ellipitcal
Planets follow an eclipse shape when orbiting around the sun. Pluto had an irregular orbit and is no refereed to as a moon.
They are a round shape.