Question

Where is the sun located on any diagram of earth's orbit?

Answer 1

Almost in the middle.

Explanation:

The Earth's orbit is almost circular, but just slightly elliptical. At its closest, the Earth is 147 million km from the sun, and at its farthest 152 million km. So if you were to draw the Earth's orbit as a big circle, the sun would be offset by about 1.7% from the center of that circle.