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Absolutely unreal. pic.twitter.com/pah5PSC0bl
— Josh Cassada (@astro_josh) February 28, 2023
US National Aeronautics and Space Administration (NASA) astronaut Josh Cassada, who is stationed on the International Space Station, shared a stunningly beautiful photo of the aurora from their vantage point on Twitter. The photo shows how the bright green reflection of light shines over the Earth.
“Absolutely unreal,” Cassada writes.
According to the media “Science Alert”, the sky above the Earth is never completely dark, not even at night. Even if all light pollution, starlight, and scattered sunlight were removed, they would not be completely dark.
Called nightglow, it occurs when molecules broken apart by solar radiation during the day recombine, releasing excess energy in the form of photons. The night glow over the Earth is all the time.
However, the aurora is visible depending on the situation. It occurs when particles of the solar wind strike the Earth’s magnetic field and are scattered, accelerated along the magnetic field lines to high latitudes near the Earth’s north or south pole, where precipitation falls into the upper atmosphere. There they interact with atmospheric particles. These interactions create moving green lights that flicker in the sky.