The earth orbits around the sun in an elliptical path. It is too oblong to be considered circular orbit.
Ellipse.
Earths orbit around the sun is not unusual.
8600000000mph
The actual shape of the earth's orbit around the sun is horrendously complicated. Partly because the earth does not orbit the sun and also because the orbit is influenced by the the gravitational attraction of the other planets. The earth does not orbit the sun: the centre of mass of the earth-sun system is at one of the foci of an ellipse whose eccentricity is 0.0167. The eccentricity varies from 0.0034 to 0.058.
Moon and earth distance
oval
Ellipse.
Ellipse.
There is no 'periodic' change in the earths orbit. The orbit is elliptical and over time (a great many years) becomes less so.
Ellipse
the earths orbit because the earths orbit is the size of earth + the size of the moon
Earths Orbit? Earths Orbit?
Earths orbit around the sun is not unusual.
earths tempertures
Venus
earths tempertures
The earths orbit around the sun is almost circular.