# SOLAR SYSTEM

## UNIVERSE

### CELESTIAL MECHANICS

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The inclination of a ____ orbit is 90 degrees
 A Ellipse B GEO C LEO D Polar
Explanation:

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.

There is 1 question to complete.