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400 photos. 11 minutes. That’s what it took to create this time-lapse of the Earth and stars as the International Space Station over Namibia toward the Red Sea. NASA astronaut Christina Koch captured these images.
It’s obvious that the circular streaks in the sky are star-trails. But the lights on the ground have different sources. Cities appear as pale yellow-white dotted streaks. Each of the dots is another frame in the time-lapse. Some of the thinner orange lines with darker hues are fires in Angola and the Democratic Republic of the Congo.
North - Thunderstorms - Africa - Many - Frames
To the north, thunderstorms are active over much of central Africa. Many of the frames captured the white flashes of lightning. A press release says, “Lightning stretches as far at the eye can see, clearly outlining Earth’s limb.” Along the horizin is a faint greenish-yellow arc that traces the atmosphere. That’s called airglow. Airglow stretches 80 to 645 km (50 to 400 miles) into Earth’s atmosphere.
The star trails are centered on a point in the upper left of the image....
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