“The Earth is closer to the Sun in summer”

It's easy to assume that our planet's warmth during summer must be due to a closer embrace with the Sun. This intuitive leap makes perfect sense on the surface: if something is hotter, it must be nearer to the heat source. For many, this simple explanation becomes the default understanding of why we experience distinct seasons, leading to the widespread belief that Earth's distance from the Sun dictates whether we're basking in summer sun or shivering through winter.

However, the true orchestrator of our seasons is not Earth's varying distance from the Sun, but rather its consistent 23.5-degree axial tilt. As Earth orbits, this tilt causes different parts of the planet to lean towards or away from the Sun at various times of the year. When a hemisphere is tilted towards the Sun, it receives more direct sunlight and experiences longer days, leading to summer. Conversely, when it's tilted away, sunlight strikes at a more oblique angle, and days are shorter, resulting in winter. The slight elliptical shape of Earth's orbit does mean its distance from the Sun changes, but this variation has a minimal effect on temperature compared to the dramatic impact of the axial tilt.

In a surprising twist, the Northern Hemisphere actually experiences its summer when Earth is near its farthest point from the Sun, a position known as aphelion. Conversely, Northern Hemisphere winter occurs when Earth is closest to the Sun, at perihelion. This counter-intuitive fact further highlights that the intensity and duration of sunlight, governed by the axial tilt, are the dominant factors determining our seasons. The myth persists because our direct sensory experience of temperature often overrides the more complex, yet accurate, astronomical explanation.