An object with enough speed will try to break the gravitational force of the body it orbits.
The relationship between the Sun’s gravitational pull and Earth’s speed creates Earth’s elliptical, rather than circular, orbit. Earth’s orbit is not as exaggerated as it is usually drawn.
At its farthest point of orbit, about July 6, Earth is 95 million miles (153 million kilometers) away from the Sun. At its closest point, about January 3, it is 91 million miles (146 million kilometers) away.