Sten Odenwald, author of The 23rd Cycle: learning to live with a stormy star(New York, …
The unique colors of the Northern Lights are created by the Earth’s spectra of gases and the height in the atmosphere where the collision of particles from the sun and the Earth’s gases takes place. I desaturated the skies by color in the top row of images (green, yellow, red, magenta, purple, blue) to show what I saw with my eyes. For this aurora, photographer Mike Taylor didn't see much of the beauty until he viewed the long-exposure-time images on his computer. Aurora Borealis Colors Explained: The colors of the aurora are probably what make most of its charm. Because the red and green line emissions from atomic oxygen are so long lived, they are good candidates for FPI observations.
The Doppler effect for light emission causes a shortening of the wavelength of the emission if the emitting atom or molecule is moving toward the observer, and a lengthening of the wave-length if it is moving away. These energetic particles come from the volume of space just above the aurora, and are accelerated by plasma physics processes that are still under investigation. The most impressive oval aurora photographer Mike Taylor had ever seen, it formed a perfect arc that covered the northern sky's horizon.
The currents from it change coming on the wires, and then disappear the mass of the aurora rolls from the horizon to the zenith.May not then the great quantity of electricity brought into the polar regions by the clouds, which are condens'd there, and fall in snow, which electricity would enter the earth, but cannot penetrate the ice; may it not, I say (as a bottle overcharged) break thro' that low atmosphere and run along in the vacuum over the air towards the equator, diverging as the degrees of longitude enlarge, strongly visible where densest, and becoming less visible as it more diverges; till it finds a passage to the earth in more temperate climates, or is mingled with the upper air?Observations of the rhythmic movement of compass needles due to the influence of an aurora were confirmed in the Swedish city of A mid 19th-century British source says auroras were a rare occurrence before the 18th-century.The aurorae on Saturn seem, like Earth's, to be powered by the solar wind. How To Paint Northern Lights. There exists a blue emission of the molecular nitrogen ion that is particularly strong in scattering sunlight, which is why we see a blue upper end of the auroral curtains The observations of the colors of the aurora, either in a broader sense by looking at the overall color balance, or by detailed spectroscopic methods, can teach us much about the physical processes that cause aurora and the effects that aurora has on the upper atmosphere.
The molecules can store this energy only for a very short time, and then radiate the energy away as light. The base of the aurora may be pink. The author wrote the book to prepare Norwegian King Magnus Lagabøte for his duties as a ruler.The term aurora borealis originated in the 1600s, when Galileo combined the word “aurora,” the Latin word for “dawn,” with the term “boreal,” the Greek word for “north.” Aurora also appears in the southern hemisphere, where it is called the “aurora australis.” Since there is very little populated landmass at high southern latitudes, there are no known historical and mythological references to the southern aurora. When the Oxygen is “excited” at these altitudes it causes the Aurora to appear in shades of green. The lights are seen above the magnetic poles of the northern and southern hemispheres. This shapes the aurora into curtain and ray-like structures When energetic electrons strike an atom or molecule, they slow down and transfer some of their energy to that atom or molecule. Because each type of atom or molecule emits colors unique to it, we can use the colors of the aurora to determine the atmospheric composition at the auroral altitude. In reality the aurora harbors many more colors! Every gas creates a different color of light: helium - orange/white, neon - red/orange, argon - lavender, krypton - gray/green, and so on. In contrast, static electric fields are unable to transfer energy to the electrons due to their conservative nature.One early theory proposed for the acceleration of auroral electrons is based on an assumed static, or quasi-static, electric field creating a uni-directional potential drop.Other mechanisms have also been proposed, in particular, That aurora is thought to have been produced by one of the most intense The conversation was carried on for around two hours using no The effect of the aurorae on the electric telegraph is generally to increase or diminish the electric current generated in working the wires.
The auroral electrons not only produce light emitting excited atoms and molecules, they also ionize some molecules.