I'll assume you mean: "... as opposed to a circular orbit". That is caused by the fact that for a circular orbit, a planet needs a VERY PRECISE SPEED. Change the speed slightly (at a particular point in the orbit), and the orbit immediately becomes elliptical.
The distance from earth and the sun is not in billions. It is around 150 million km away (93.20567 miles).Sometimes this changes because of our orbit which is elliptical, not circular, thus the variation. This is also called'1 Astronomical Unit'.
Our Earth is a body that is in orbit round the Sun.
Obviously, it is called a year. It is also one full revolution of the earth. The earth revolves around the sun, and it rotates on its axis.apexRevolution
It would need to be launched into a tangent plane parellel to that of the earth's orbit around the sun, with the same speed of rotation around the sun
If by revolution you mean the spin on it's own axis this is more or less a perfect circle. If you are referring to it's orbit around the sun, this is elliptical, not a perfect circle.
The earth moves around the sun in a elliptical orbit.
The Earth revolves around the sun in an elliptical (egg-shaped) orbit.
Sun. The elliptical shape of Earth's orbit is why it's sometimes closer and sometimes farther from the Sun, causing variations in seasons and temperatures. This motion is governed by gravity, keeping Earth in its orbit around the Sun.
The time it takes Earth to orbit around the sun is a year
All planets in our solar system, including the the Earth have an elliptical orbit around our Sun. In Earth's case, the orbit is nearly circular.
It has an elliptical orbit around the Sun.
A revolution. That is how we measure years.
The Earth goes round the Sun in an elliptical orbit, once every year, and this produces the four seasons.
The imaginary elliptical path of the Earth around the Sun is called its orbit. It is not a perfect circle, but an ellipse, with the Sun located at one of the foci of the ellipse. The Earth's orbit is slightly elliptical, which means that the distance between the Earth and the Sun varies throughout the year.
A solar year.
The path Earth travels around the sun is called an orbit. This orbit is elliptical in shape, meaning it is not a perfect circle but is slightly elongated. Earth takes 365.25 days to complete one orbit around the sun.
The path that Earth takes as it revolves around the sun is called its orbit.