保护地球，探索宇宙，发现文明
2022年7月16日 Tycho and Clavius at Dawn Image Credit & Copyright: Eduardo Schaberger Poupeau Explanation: South is up in this dramatic telescopic view of the lunar terminator and the Moon’s rugged southern highlands. The lunar landscape was captured on July 7 with the moon at its first quarter phase. The Sun shines at a low angle from the right as da...
2022年4月22日 Planet Earth at Twilight Image Credit: ISS Expedition 2 Crew, Gateway to Astronaut Photography of Earth, NASA Explanation: No sudden, sharp boundary marks the passage of day into night in this gorgeous view of ocean and clouds over our fair planet Earth. Instead, the shadow line or terminator is diffuse and shows the gradual transition to darkness...
2022年2月15日 Terminator Moon Image Credit: NASA, Lunar Reconnaissance Orbiter, SVS; Processing & Copyright: Jai & Neil Shet Explanation: What’s different about this Moon? It’s the terminators. In the featured image, you can’t directly see any terminator — the line that divides the light of day from the dark of night. That̵...
2021年9月22日 Equinox on a Spinning Earth Image Credit: Meteosat 9, NASA, earthobservatory, Robert Simmon Explanation: When does the line between night and day become vertical? Today. Today is an equinox on planet Earth, a time of year when day and night are most nearly equal. At an equinox, the Earth’s terminator — the dividing line between day and...
2021年04月22日 Planet Earth at Twilight Image Credit: ISS Expedition 2 Crew, Gateway to Astronaut Photography of Earth, NASA Explanation: No sudden, sharp boundary marks the passage of day into night in this gorgeous view of ocean and clouds over our fair planet Earth. Instead, the shadow line or terminator is diffuse and shows the gradual transition to darknes...