The word "perihelion" stems from the Greek words peri (near) and helios (sun). It refers to the specific point in a planet's orbit where it is at its minimum distance from the Sun.
Earth does not orbit the Sun in a perfect circle. Instead, our path is a slightly stretched-out oval, or an . Because of this eccentric shape, the distance between the Earth and the Sun varies by about 3 million miles throughout the year. When Does It Happen?
If you asked a random person on the street, "When is the Earth closest to the Sun?" the most common answer would likely be, "During the summer." when earth is closest to sun
Earth's perihelion is a significant event that marks the closest approach of our planet to the Sun. While it does not have a profound impact on Earth's climate, it is an interesting phenomenon that highlights the complexities of our planet's orbit and its relationship with the Sun. As we continue to study and explore our solar system, understanding events like perihelion helps us appreciate the intricate dance of celestial bodies and their effects on our planet.
This is the most common and fascinating misunderstanding. The reason: The word "perihelion" stems from the Greek words
While being 3 million miles closer does mean Earth receives about 7% more solar energy during perihelion than at aphelion, this slight increase in intensity is overshadowed by the effect of the tilt. However, it does contribute to Southern Hemisphere summers being, on average, slightly warmer than Northern Hemisphere summers. Does the Date Ever Change?
If you want to celebrate perihelion, just know it happens in early January — often around New Year’s week. You can’t “see” it directly without instruments, but you can note the Sun’s slightly bigger disk (safely through a solar filter or projection) and appreciate that Earth is racing along faster than at any other time of the year. Instead, our path is a slightly stretched-out oval, or an
Earth reaches perihelion once every 365.25 days. Currently, this occurs in , usually about two weeks after the Winter Solstice.
If distance were the primary driver of seasons, the entire planet would experience summer simultaneously in January.