日全食期间的地球
2020年12月29日
Earth During a Total Solar Eclipse
Video Credit: GOES-16, ABI, NOAA, NASA
Explanation: What does the Earth look like during a total solar eclipse? It appears dark in the region where people see the eclipse, because that’s where the shadow of the Moon falls. The shadow spot rapidly shoots across the Earth at nearly 2,000 kilometers per hour, darkening locations in its path — typically for only a few minutes — before moving on. The featured video shows the Earth during the total solar eclipse earlier this month. The time-lapse sequence, taken from a geostationary satellite, starts with the Earth below showing night but the sun soon rises at the lower right. Clouds shift as day breaks over the blue planet. Suddenly the circular shadow of the Moon appears on the left and moves rapidly across South America, disappearing on the lower right. The video ends as nightfall begins again. The next total solar eclipse will occur next December — but be visible only from parts of Antarctica.
Gallery: Notable images of the recent Total Solar Eclipse submitted to APOD
Tomorrow’s picture: planets dance
日全食期间的地球
影片提供: GOES-16, ABI, NOAA, NASA
说明: 在日全食期间，地球拥有何种样貌？能见到日全食的区域会是黝黑的，因为月影就落在该处。这团月影以每小时将近2,000公里的速度掠过地表，而在这道全食带上，每个地点沉浸在暗影里的时间，通常只有短短的数分钟。上面这部主题影片，呈现在这个月稍早的日全食期间之地球风貌。由地球同步卫星拍摄的这部缩时影片，起启时下方的地球沉浸在夜幕里，但不久之后，太阳就从右下方升起。而随着时间推移，白云在地球上空回旋。然后，月球的圆影突然出现在左侧，快速掠过南美洲，接着消失在右下方。在影片终结时，黑夜再次笼罩大地。下个日全食事件将出现在明年的12月，不过只有南极洲的部分区域才得见。
明日的图片: planets dance
