SOLAR SYSTEM

Detailed explanation-1: -An inclination of 90 degrees indicates a polar orbit, in which the spacecraft passes over the north and south poles of the planet. An inclination of 180 degrees indicates a retrograde equatorial orbit.

Detailed explanation-2: -Prograde orbits are those with inclination angles less than 90°; retrograde orbits are those with i greater than 90°. The ascending node is the point where the satellite crosses the equatorial plane going north (ascends).

Detailed explanation-3: -This angle is called the inclination. A satellite that orbits parallel to the equator has a zero-degree orbital inclination. A satellite in a polar orbit has a 90-degree inclination.

Detailed explanation-4: -An orbit with an inclination between 0 and 90 degrees is considered prograde or direct (many astronomers prefer the latter term when it comes to natural satellites) and travels with the direction of the Earth’s rotation.