Question

WRITE THE SHORT NOTE ON!

(1) Perihelion Position

(2) Aphelion Position

(3) Circle Of illumination

(Write it as own don't take a help of internet)....​

Answer 1

Answer:

1. The position of closest approach, i.e. the shortest distance between the Sun and the planet, is known as the perihelion (from the Greek peri = near and helios = Sun). At this point in the orbit, the planet is moving at its maximum speed (Kepler's Second Law).
2. Happy Fourth of July – and Aphelion Day! This Saturday, July 4, Earth will be at the farthest point in its orbit around the sun, also known as aphelion. Aphelion will occur at 7:34 a.m. EDT (11:34 GMT), at which time Earth will be about 94,507,635 miles (152,095,295 kilometers) from the sun.
3. The imaginary line that separates light from the darkness and day from the night is known as the circle of illumination. Earth's axis refers to an imaginary line going through the centre of the earth from top to bottom. The circle of illumination cuts all latitudes into half on the spring and autumnal equinoxes.