Dan Snow on Instagram: "Stonehenge is aligned to the movement of the sun. On the summer solstice it rises above a particular stone to cast its light on the so called altar stone. The winter solstice sunset is aligned as well. This was my attempt to film it two years ago. #solstice #history #archaelogy"

Star Walk 2 — Best Astronomy App 💫 on Instagram: "Happy December Solstice, everyone! 🌞✨⁠ ⁠ On December 21, 2025 (at 15:03 UTC), the Sun reaches its southernmost point in our sky — officially kicking off astronomical winter in the Northern Hemisphere and summer in the Southern Hemisphere. ⁠ ⁠ Why it happens:⁠ Earth is tilted ~23.5°, so as we orbit the Sun, one hemisphere leans toward the sunlight while the other leans away.⁠ ⁠ What it means today:⁠ • Northern Hemisphere → shortest day + longest