Auroas Essay Example | Topics and Well Written Essays - 2750 words

Auroas - Essay ExampleThe subject of these first abstemiouss and related issues such as the aurora borealis and aurora australis atomic number 18 of great significance and importance, and in order to come to a clearer and more cozy understanding of these issues, the related information must be addressed thoroughly. The aim of this paper is to discuss any of this, as well as explain how each of the sub-subject matters are related and correlated. This is what will be dissertated in the following.Auroras are caused by high energy particles from the solar wind that are trapped in the Earths magnetised field. These particles, as they spiral back and forth along the magnetic field lines, come down into the tune near the north and south magnetic poles where the magnetic field lines disappear into the body of the Earth. The delicate colourise are caused by energetic electrons colliding with oxygen and nitrogen molecules in the atmosphere. This excites the molecules, and when they dec ay from the excited states they emit the light that we see in the aurora. (Csep, n.d.). More intricately, the sun sends a constant stream of charged particles, known as a solar wind, into space then these energized particles interact with a protective magnet shield that shrouds the artificial satellite Earth. The Earths magnetosphere is a sort of shield, which is made up of invisible lines that radiate out into space from the northern and gray poles. The charged particles squeeze the magnetic field into a teardrop shape, and In the magnetosphere, researchers say, the interaction creates electric handle and electromagnetic waves that transfer their energy to electrons, which then plunge into the atmosphere. (Britt, 2000). The aurora varies in intensity from brightness disturb to that of the Milky Way up to the equivalent of a full Moon, says climatologist Jan Curtis, who photographs auroras from his home in Alaska. Colors figure from mostly greens to reds, and take on the forms of discrete rays, homogenous brands and arcs, or diffuse glowing clouds. Their exercise can be stationary, or zip across the entire sky in seconds. (Britt, 2000). Primary aurorean particles have energies between few tens eV and few hundred keV, being higher on the nightside than on dayside. Some of them are even accelerated in the field-aligned direction, which indicates the presence of a special auroral acceleration region. It can be coming into courtn that for 2 keV (100keV) electrons the maximum ionization rate occurs at the altitude of about one hundred thirty km (85 km). (Space, 1998). Whereas the average ionization potential of atoms and molecules is about 15 eV, some experimental data show that fast electrons and protons produce one ion-electron pair per 36 eV, and some excess energy is also left(a) for the product electron this is what leads to electron heating when the energy is being distributed through and among the ambient electron gas.Auroras are considered to appe ar as a glow observed in the night sky, usually the polar zone. (Wikipedia, 2006). It is for this antecedent that some scientists call auroras polar auroras or aurora polaris. In more northern of latitudes, this occurrence is known as aurora borealis, which is Latin for