What you need to know about the two key points in Earth’s journey around the Sun: aphelion, when we’re farthest from the Sun, and perihelion, when we’re closest...
- Aphelion arrives: On 3 July 2025, Earth is 152 million km from the Sun, its most distant point all year.
- Orbit, not seasons: Summer’s heat isn’t about distance: it’s Earth’s tilt, not aphelion and perihelion, that shapes our seasons.
- Elliptical path: Earth’s orbit is slightly egg-shaped, causing these annual near and far points.
- DIY science: With the right solar filter, you can photograph and compare the Sun’s size at aphelion and perihelion.
- Noticeable difference: The Sun appears smaller at aphelion – spot the change with patience and safe solar viewing!
Warning: Never observe the Sun without proper solar observing equipment, as doing so could damage your eyesight

Curious about how Earth’s journey shapes our sky? Read our full news story This week you are further from the Sun than at any other time this year. Here's why.