保护地球，探索宇宙，发现文明
2021年7月11日 Find the Moon Image Credit & Copyright: Jimmy Westlake (Colorado Mountain College) Explanation: Where’s the Moon? Somewhere in this image, the Earth’s Moon is hiding. The entire Moon is visible, in its completely full phase, in plain sight. Even the photographer’s keen eye couldn’t find it even though he knew exactly w...
2020 February 27 Two Hemisphere Night Sky Image Credit & Copyright: Petr Horálek/ESO, Juan Carlos Casado/IAC (TWAN) Explanation: The Sun is hidden by a horizon that runs across the middle in this two hemisphere view of Earth’s night sky. The digitally stitched mosaics were recorded from corresponding latitudes, one 29 degrees north and one 29 degre...