400 pictures. 11 minutes. That’s what it took to create this time-lapse of the Earth and stars because of the International Space Station over Namibia towards the Red Sea. NASA astronaut Christina Koch captured these pictures.
It’s apparent that the round streaks within the sky are star-trails. However, the lights on the bottom have completely different sources. Cities seem like pale yellow-white dotted streaks. Every one of the dots is one other body within the time-lapse. A few of the thinner orange traces with darker hues are fires in Angola and the Democratic Republic of the Congo.
To the north, thunderstorms are lively over a lot of central Africa. Lots of the frames captured the white flashes of lightning. A press launch says, “Lightning stretches as far on the eye can see, clearly outlining Earth’s limb.” Alongside the horizon is a faint greenish-yellow arc that traces the environment. That’s referred to as airglow. Airglow stretches 80 to 645 km (50 to 400 miles) into Earth’s environment.
The star trails are centered on a degree within the higher left of the picture. In a press launch, Matthew Osvog of NASA Johnson House Middle’s ISS Flight Operations Pointing console stated, “This level is basically regular (perpendicular) to the ISS orbital airplane, immediately out of the port aspect of the car primarily based on the spacecraft silhouettes.”
The celebrities near this perpendicular vector (close to the higher left) seem stationary through the brief length of the time-lapse sequence, whereas stars with rising angular distance (additional away from the conventional vector) hint out giant circles because the ISS rotates in inertial house and whereas orbiting the Earth. As seen in this composite picture, the star trails ultimately get massive sufficient to dip behind Earth’s limb.
A number of the mild trails are on completely different arcs. They’re satellites that handed by through the 11 minutes of the time-lapse.
Astronaut Koch has been on the ISS for about eight months. Throughout that point, she took half within the first all-lady spacewalk to switch some batteries for the station’s solar array. She’s additionally been energetic on Twitter sharing a few of her experiences.