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    • Just wanted to rescue a previous post of mine from a little more than 2 years and a half ago: https://en.m.wikipedia.org/wiki/Aurora "Most of the planets in the Solar System, some natural satellites, brown dwarfs, and even comets also host auroras". "Colors and wavelengths of auroral light:Edit Red: At its highest altitudes, excited atomic oxygen emits at 630 nm (red); low concentration of atoms and lower sensitivity of eyes at this wavelength make this color visible only under more intense solar activity. The low number of oxygen atoms and their gradually diminishing concentration is responsible for the faint appearance of the top parts of the "curtains". Scarlet, crimson, and carmine are the most often-seen hues of red for the auroras. Green: At lower altitudes, the more frequent collisions suppress the 630 nm (red) mode: rather the 557.7 nm emission (green) dominates. A fairly high concentration of atomic oxygen and higher eye sensitivity in green make green auroras the most common. The excited molecular nitrogen (atomic nitrogen being rare due to the high stability of the N2 molecule) plays a role here, as it can transfer energy by collision to an oxygen atom, which then radiates it away at the green wavelength. (Red and green can also mix together to produce pink or yellow hues.) The rapid decrease of concentration of atomic oxygen below about 100 km is responsible for the abrupt-looking end of the lower edges of the curtains. Both the 557.7 and 630.0 nm wavelengths correspond to forbidden transitions of atomic oxygen, a slow mechanism responsible for the graduality (0.7 s and 107 s respectively) of flaring and fading. Blue: At yet lower altitudes, atomic oxygen is uncommon, and molecular nitrogen and ionized molecular nitrogen take over in producing visible light emission, radiating at a large number of wavelengths in both red and blue parts of the spectrum, with 428 nm (blue) being dominant. Blue and purple emissions, typically at the lower edges of the "curtains", show up at the highest levels of solar activity.[23] The molecular nitrogen transitions are much faster than the atomic oxygen ones. Ultraviolet: Ultraviolet radiation from auroras (within the optical window but not visible to virtually all[clarification needed]humans) has been observed with the requisite equipment. Ultraviolet auroras have also been seen on Mars,[24] Jupiter and Saturn. Infrared: Infrared radiation, in wavelengths that are within the optical window, is also part of many auroras.[24][25] Yellow and pink are a mix of red and green or blue. Other shades of red, as well as orange, may be seen on rare occasions; yellow-green is moderately common.[clarification needed] As red, green, and blue are the primary colors of additive synthesis of colors, in theory, practically any color might be possible, but the ones mentioned in this article comprise a virtually exhaustive list". "There is a color differential with altitude; at high altitudes oxygen red dominates, then oxygen green and nitrogen blue/purple/red, then finally nitrogen blue/purple/red when collisions prevent oxygen from emitting anything. Green is the most common color. Then comes pink, a mixture of light green and red, followed by pure red, then yellow (a mixture of red and green), and finally, pure blue". "Both Jupiter and Saturn have magnetic fields that are stronger than Earth's (Jupiter's equatorial field strength is 4.3 Gauss, compared to 0.3 Gauss for Earth), and both have extensive radiation belts. Auroras have been observed on both gas planets, most clearly using the Hubble Space Telescope, and the Cassini and Galileo spacecraft, as well as on Uranus and Neptune". That with the line of Coloratura line "the purple, yellow, green, red, orange and the blue", has to have some connection with the 🌈 (considering that these colours are also the rainbow colours).
    • Two thoughts about the song: what a pity that the little guitar sound that plays around minute 2:50 isn't more prominent and more developed. Also, the sounds that start at minute 3:34 are very Angels & Airwaves-esques, which is a good thing.
    • Arabesque vs White Shadows
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