Northern lights

The aurora borealis is due to the emission of photons by excited-state atoms and molecules in the thermosphere, hi the Northern Hemisphere, the aurora is called the Northern Lights. 

This has led to such cases in the history of chemistry that spectroscopic signals have been unidentified till newly discovered elements was found (e.g. rubidium, caesium, indium, helium, rhenium) or new species (highly ionized atoms, e.g. in northern lights [aura borealis], luminous phenomena in cosmic space and sun aura, such as nebulium , coronium , geocoronium , asterium , which was characterized at first to be new elements see Bowen [1927] Grotrian [1928] Rabinowitsch [1928]). 

A slightly more in-depth study of colour is afforded by The Physics and Chemistry of Colour by Kurt Nassau, Wiley, Chichester, 2001. The author describes many everyday examples of colour, from peacock tails through to the Northern Lights, Aurora Borealis. Its Chapter 1 is an overview, and is probably a little highbrow at times, but overall is a fascinating read. 

Today, scientists explain the northern lights as resulting from streams of protons and electrons—plasma—emanating from the Sun. When the electrons from the plasma interact with gaseous atoms in Earth s upper atmosphere, the atoms emit coloured light. 

Nineteenth-century atomic theory could not explain why the aurora exhibits a limited range of specific wavelengths, rather than the full visible spectrum. Early in the twentieth century, however, scientists developed a revolutionary new model of the atom. This model, and the theory that supports it, helped to account for many puzzling phenomena that the existing atomic theory had failed to explain. Among these phenomena are the characteristic colours of the northern lights. 

The green colours in the northern lights come from the interaction of accelerated electrons with oxygen atoms. The red colours usually come from nitrogen atoms. How do these interactions lead to atoms of different elements emitting light with characteristic wavelengths ... 

Northern Light http //www.northernlight.com/news.html... 

Several metasearch programs automate the process of submitting a query to multiple search engines. These include Metacrawler at http //www. metacrawler.com and SurfWax at http //www.surfwax.com./ Note that metasearch engines tend to have two drawbacks They may overwhelm you with results (and insufficiently prune duplicates), and they often do not use some of the more popular search engines (such as Google or Northern Light). 

This is a theory explaining the northern lights by the brilliance of the herring scales. (Dieses ist eine Theorie, die [...] das Nordlicht durch den Glanz der Heringe erklart)... 

Brekke, A. and A. Egland (1994) The Northern lights their heritage and science. Grondabl og Dreyets Forlag AS, Oslo. 

Northern lights are seen almost every night by observers within about 2000 km of the north magnetic pole and are visible in the northern parts of the United States several times a year. They have even been seen as far south as Mexico during times of massive solar disturbances. 

The beautiful northern lights, or aurora borealis, are often observed in the Northern Hemisphere at high latitudes. The light is partly produced by excited O atoms in the upper atmosphere. 

Scientists have fixed 960 km as the approximate upper limit of the atmosphere. Aurora Borealis or the Northern light is the basis for this conclusion. 

People travel thousands of miles to see the aurora borealis (the northern lights) and the aurora australis (the southern lights). Once incorrectly believed to be reflections from the polar ice fields, the auroras occur 100 to 1000 km above Earth. 

Vegetarians visiting Anchorage will be pleased at the city s offerings, especially for lunchtime fare. Middleway Cafe (1200 W. Northern Lights Blvd., o 907-272-6433), located right next to REI outfitters, is an excellent source for inexpensive sand-... 

Natural food stores are also easy to find in Anchorage. Natural Pantry (601 E. Dimond Blvd., b 907-522-4330) is the largest, with a vast selection of organic produce and a good-sized deli. A daily vegetarian entree is always available for take-home. The store also takes Bush Orders for those who need a delivery to the backcountry. Other options are Anna s Health Foods (1403 Hyder St., b 907-277-2662), which is owned by a certified nutritionist, and Roy s Health Foods (501 E. Northern Lights, b 907-277-3226). 

FIGURE 17.4 Aurora borealis, commonly referred to as the northern lights. 

The Northern Lights over Alberta, Canada, are the result of chemistry in the atmosphere. 

Dalton had inferred from the way that elements combined with each other that these fundamental building blocks of matter were made of atoms and that the atoms of any element were identical to each other but different in mass from the atoms of other elements. He also meticulously recorded his observations of weather patterns, the northern lights, and the behavior of gases. As well, he discovered that he d made these observations with eyes that were different from others he was color-blind Dalton already suspected that he had vision problems, because his fellow Quakers would occasionally object to the loud colors he wore to his eye, the shade of his attire seemed quite sedate. 

Web Crawler Starting Point Northern Lights Dog Pile... 

Akasofu, S.-I. (1979). Aurora Borealis, the Amazing Northern Lights, Alaska Geographic Society, Anchorage. 

Brekke, A., and Egeland, A. (1983). The Northern Light From Mythology to space Research, Springer-Verlag, Berlin and New York. Chamberlain, J. W. (1961). Physics of the Aurora and Airglow, Academic Press, New York. 

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