The Sun is almost, but not quite, perfectly round. Technically it is an oblate spheroid with an ellipticity of 9 times 10 to the minus 6, a tiny amount.
An elliptical orbit round the Sun.
In an elliptical orbit. E.g. not entirely round.
The Earth goes round the Sun in an elliptical orbit, once every year, and this produces the four seasons.
The Earth goes around the Sun in a path which is an ellipse. It takes about 365.25 days to go round once.
At it point of aphelion in its elliptical orbit Round the Sun. This happens on the 4th of July each year. At this moment the Sun - Earth distance is 152,102,196 kilometers.
Mercury: Elliptical Venus: Elliptical Earth: Elliptical Mars: Elliptical Jupiter: Elliptical Saturn: Elliptical Uranus: Elliptical Neptune: Elliptical All planets revolve around the Sun in elliptical orbits, with the Sun located at one of the two foci of the ellipse.
Oval.
Yes, the distance from the sun is variable for anything with an elliptical orbit.
The planet that travels around the sun is Earth, along with seven other planets in our solar system. These planets follow elliptical orbits around the sun due to the gravitational pull of our star.
Because the Earth travels round the Sun in an elliptical orbit and at present the closest approach the Sun during that elliptical orbit occurs during the Northern winter. However precession of the axis of the Earth's rotation means that in about 12 thousand years time, the closest approach will be during the Northern Summer.
Each planet moves in its own elliptical orbit round the Sun, then and now.
An elliptical galaxy is round. A spiral galaxy is shaped like a spiral.