保护地球，探索宇宙，发现文明
2021年06月20日 Sunrise Solstice over Stonehenge Image Credit & Copyright: Max Alexander, STFC, SPL Explanation: Today the Sun reaches its northernmost point in planet Earth’s sky. Called a solstice, many cultures mark this date as a change of seasons — from spring to summer in Earth’s Northern Hemisphere and from fall to winter in Earth&#...
2020年7月14日 Comet NEOWISE over Stonehenge Image Credit & Copyright: Declan Deval Explanation: Have you ever seen a comet? Tonight — and likely the next few nights — should be a good chance. Go outside just at sunset and look to your northwest. The lower your horizon, the better. Binoculars may help, but if your sky is cloudless and dark, all ...