the.com/axial tilt
earth wears its seasons on a 23.5 degree slant, not a straight spine.
means the angle between a planet's rotational axis and the vertical to its orbital plane, which is why you get seasons instead of endless sameness.
from astronomers call it obliquity, from latin obliquus meaning slanting; earth's tilt is thought to date from a mars-sized impact early in the solar system's formation, the same collision that likely birthed the moon.
not the distanceseasons come from tilt, not earth-sun distance
wobbles slowlytilt drifts between 22.1 and 24.5 degrees over 41000 years
moon stabilizes itwithout the moon, earth's tilt could swing chaotically
uranus is sidewaysits tilt is 98 degrees, rolling like a barrel