“The Earth is getting closer to the sun.”

A common misconception suggests that our planet is gradually drawing closer to the Sun. This idea might stem from our everyday experience of seasonal temperature changes, leading to an intuitive, though incorrect, assumption that hotter weather means we are nearer to our star. However, this interpretation misunderstands the true nature of Earth's cosmic journey.

The reality is that Earth's orbit around the Sun is an ellipse, not a perfect circle, meaning its distance naturally varies throughout the year. Earth is actually closest to the Sun, a point known as perihelion, in early January, and farthest, at aphelion, in early July. This slight variation in distance has a minimal impact on our climate compared to the Earth's axial tilt, which is the primary driver of our seasons. In fact, over extremely long geological timescales, the Earth's orbit is actually slowly expanding due to the Sun's gradual loss of mass through solar wind and radiation, and the subtle gravitational influence of tidal forces. This expansion is minuscule, occurring at a rate of approximately 1.5 centimeters per year, and is not perceptible within a human lifetime.

People commonly believe our planet is getting closer to the Sun largely because of the mistaken correlation between our perceived distance from the Sun and the warmth of the seasons. In the Northern Hemisphere, summer brings warmth even when the Earth is farther from the Sun, while winter brings cold when it is closer. This counterintuitive fact, combined with the difficulty in grasping the immense scales of astronomical distances and the subtle mechanics of orbital dynamics, contributes to the persistence of this widespread myth.