Here's why:
* The Sun's position in the sky is determined by the planet's axial tilt and its orbit around the sun. Planets have different axial tilts (the angle between a planet's rotational axis and its orbital plane).
* The Earth's axial tilt is approximately 23.5 degrees. This tilt causes the sun's apparent position in the sky to shift throughout the year, resulting in seasons.
* Other planets have varying axial tilts. For example, Uranus is tilted on its side at about 98 degrees. This means the sun's position in the sky is extremely different throughout its year.
Therefore, the sun will not be directly over the equator of all planets at any given time. Each planet experiences a different seasonal variation depending on its axial tilt and its position in its orbit.
