March 16, 2020
2 of Earths most vibrant upper climatic phenomena, aurora and airglow, met just prior to dawn in this image shot by an astronaut on the International Space Station (ISS). The rising Sun, behind Earths limb at the time of this photo, includes a deep blue to the horizon.
They appear at comparable elevations, aurora and airglow are produced by different physical processes. Nighttime airglow (or nightglow) is a kind of chemiluminescence– the emission of light from chemical interactions between oxygen, nitrogen, and other molecules in the upper environment. Airglow occurs all around the Earth, all the time. “nightglow” is much easier to find over a dark Earth than “dayglow,” as airglow is simply one billionth as bright as the Sun.
Auroras, on the other hand, come from interactions between solar energy and Earths magnetic field. The electromagnetic field funnels the energy into the upper environment, where it communicates with the exact same atoms as airglow (mainly oxygen and nitrogen). This is why both phenomena can produce comparable colors. The vibrant nature of Earths electromagnetic field moves the solar power in irregular methods, causing each aurora event to be visually unique.
Just recently, the Earth Science and Remote Sensing Unit at NASAs Johnson Space Center utilized maker learning to recognize all of the pictures that astronauts have actually taken of auroras over the previous couple of decades. Browse the Gateway to Astronaut Photograph of Earth database for “aurora” to see more than 270,000 pictures of these magnetic marvels.
Astronaut photograph ISS062-E-98264 was obtained on March 16, 2020, with a Nikon D5 digital camera utilizing a 50-millimeter lens and is offered by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space. The image was taken by a member of the Expedition 62 crew. The image has been cropped and improved to enhance contrast, and lens artifacts have been gotten rid of. The International Space Station Program supports the lab as part of the ISS National Lab to assist astronauts take photos of Earth that will be of the best value to scientists and the general public, and to make those images freely offered on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Caption by Alex Stoken, Jacobs, JETS Contract at NASA-JSC.

Two of Earths a lot of colorful upper climatic phenomena, aurora and airglow, fulfilled simply prior to dawn in this photo shot by an astronaut on the International Space Station (ISS). Astronaut photo ISS062-E-98264 was acquired on March 16, 2020, with a Nikon D5 digital video camera using a 50-millimeter lens and is supplied by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space. The International Space Station Program supports the laboratory as part of the ISS National Lab to assist astronauts take photos of Earth that will be of the biggest worth to researchers and the public, and to make those images freely available on the Internet. Additional images taken by cosmonauts and astronauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth.

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