Question

What is obliquity angle?

Answer 1

To answer the question, we must first comprehend the concept of obliquity. The plane of orbit of a planet is referred to as obliquity. The angle between a perpendicular to its orbital plane and its spin axis — the tilt of its axis – when an orbiting planet rotates on its axis is known as obliquity.

Complete step by step answer:
It is the angle of the planet's polar axis with respect to the orbital plane's normal.
The obliquity of the planet is defined as the inclination of the polar axis (around which a planet rotates for day and night) to the normal to the orbital plane.
The obliquity of the Earth is roughly ${23.4^ \circ }$ .

Additional Information:
The obliquity or inclination of the Martian spin axis is ${24^ \circ }$ , which is similar to the Earth's obliquity of${23.4^ \circ }$ . As a result, Mars has seasons just like Earth. Seasons on Mars, on the other hand, are much more asymmetric in terms of heating and length than seasons on Earth because the eccentricity of the Martian orbit is an order of magnitude larger than the eccentricity of the Earth's orbit.

Note: The obliquity of the axis does not change much throughout the duration of an orbital period, and the orientation of the axis relative to the background of stars does not change much. This causes one pole on one side of the orbit to be more pointed toward the Sun than the other, resulting in the seasons on Earth.