Earth is a really wonderful place.We understand thats not the sort of thing you d anticipate to keep reading a science site, but just take an appearance at the image above – a pre-dawn picture taken by an Expedition 62 crew member on the International Space Station (ISS) back in March.
In this image, taken when the ISS was flying simply south of the Alaskan Peninsula, the great colours youre seeing are particles in Earths upper atmosphere engaging in different ways, resulting in two totally different atmospheric phenomena in one picture.Truly wonderful to look at, but likewise quickly explained with some science.The initially phenomenon is the aurora – the radiant green, red-tipped phenomenon on the left side of the image. Auroras occur when charged particles from the solar wind struck Earths magnetosphere– a kind of protective cape where such particles are at the whims of our magnetic field.Mixed with climatic gases such as oxygen and nitrogen, the particles develop the colours we understand as the aurora.Excited by solar wind, oxygen atoms at the highest altitude release this excess energy as the red glow, while the green is brought on by fired up oxygen or nitrogen molecules launching energy at lower altitudes.But the aurora is only one part of this specific shot. Moving right on the image above, take an appearance at the yellow-red band of light right above the curve of our planet. Its called an airglow, and its more subtle than the aurora, but simply as cool. To comprehend airglow– more particularly nightglow– you require to keep in mind that the night sky is never ever completely dark, not even once youve extracted light pollution, starlight, and diffuse sunlight.Instead, atoms produce em issions from remaining in their thrilled state. For instance, oxygen thats been disintegrated throughout the day recombine and release their additional energy as photons at night. Nitrogen molecules and reactions in between nitrogen and oxygen add to this radiance as well.Earths nightglow. (NASA) The photons launched in this case appear green, as in this image above, but yellow often takes place at a lower layer (around 80 to 100 kilometres above the surface area of Earth). Meteors separate in this layer of the atmosphere, and release salt atoms into the air, hence its aptly named the salt layer; delighted salt atoms will develop a noticeably yellow glow.As a reward, the increasing sun behind Earth is causing the edge of the planet to appear dark blue. This occurs for the exact same factor that the sky is blue throughout the day– when sunlight hits the particles in our atmosphere, blue light (among the quickest wavelengths) is spread, while other coloured light is mainly let through.We informed you, definitely wonderful..


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