Posts filled under #aurora

My best friend is better

My best friend is better than yours . Ily so much liz words cannot be punt Toni my mouth on how much you mean to me and what you've done for me. I'm absolutely blessed to have you as my best friend. I have never been really excited for school before and I only am because we get to have classes together and nest so we get to mess around and be weird . Ily so so so much lizzy. I don't want you to ever leave my life. (there's a source of all sorrows joke in there lollllll) #tumblr #mess #saveme #tp #aesthetic #fallinginreverse #donteatsoap #hollywoodundead #halsey #melaniemartinez #scene #scenekid #youtube #youtubers #botdf #breakingbenjamin #tumblraesthetic #askingalexandria #sws #ptv #aurora #motionlessinwhite #bvb #emo #scenehair #patd #andybiersack

Essa tcnica

LUGARXFOTO Essa tcnica bem legal e cria esse efeito lindo na gua q arremessada... Faz a fotometria no por do sol para o casal ficar silhueta, coloca uma assistente com o Flash atras apontado para o casal, depois pedir para os noivos jogarem gua pra cima Fica lindo esse efeito gente. . . . #dress #body #aurora #trunkshow #weddingforward #wedding #bride #bridetobe #weddingday # #newyorkcity #weddingphotography #chloe #bridesmaids #weddinginspiration #instawedding #weddingparty #weddingideas #weddingplanning #weddingphoto #weddingtime #instabride #gettingmarried #weddingblog #dreamwedding #newlywed #weddingphotographer #weddingidea #weddingshot #instaphoto

An extract on #aurora

Most auroras occur in a band known as the auroral zone, which is typically 3 to 6 wide in latitude and between 10 and 20 from the geomagnetic poles at all local times (or longitudes), most clearly seen at night against a dark sky. A region that currently displays an aurora is called the auroral oval, a band displaced towards the nightside of the Earth. Early evidence for a geomagnetic connection comes from the statistics of auroral observations. Elias Loomis (1860), and later Hermann Fritz (1881) and S. Tromholt (1882) in more detail, established that the aurora appeared mainly in the auroral zone. Day-to-day positions of the auroral ovals are posted on the internet. In northern latitudes, the effect is known as the Aurora Borealis or the Northern Lights. The former term was coined by Galileo in 1619, from the Roman goddess of the dawn and the Greek name for the north wind. The southern counterpart, the Aurora Australis or the Southern Lights, has features that are almost identical to the Aurora Borealis and changes simultaneously with changes in the northern auroral zone. The Aurora Australis is visible from high southern latitudes in Antarctica, Chile, Argentina, New Zealand, and Australia. A geomagnetic storm causes the auroral ovals (north and south) to expand, and bring the aurora to lower latitudes. It was hardly ever seen near the geographic pole, which is about 2000 km away from the magnetic pole. The instantaneous distribution of auroras ("auroral oval") is slightly different, being centered about 35 degrees nightward of the magnetic pole, so that auroral arcs reach furthest toward the equator when the magnetic pole in question is in between the observer and the Sun. The aurora can be seen best at this time, which is called magnetic midnight. Auroras seen within the auroral oval may be directly overhead, but from farther away they illuminate the poleward horizon as a greenish glow, or sometimes a faint red, as if the Sun were rising from an unusual direction. Auroras also occur poleward of the auroral zone as either diffuse patches or arcs, which can be sub-visual. Auroras are occasionally seen in latitudes below the auroral zone, when a geomagnetic storm temporarily enlarges the auroral oval. Large geomagnetic storms are most common during the peak of the eleven-year sunspot cycle or during the three years after the peak. An aurora may appear overhead as a "corona" of rays, radiating from a distant and apparent central location, which results from perspective. An electron spirals (gyrates) about a field line at an angle that is determined by its velocity vectors, parallel and perpendicular, respectively, to the local geomagnetic field vector B. This angle is known as the "pitch angle" of the particle. The distance, or radius, of the electron from the field line at any time is known as its Larmor radius. The pitch angle increases as the electron travels to a region of greater field strength nearer to the atmosphere. Thus it is possible for some particles to return, or mirror, if the angle becomes 90 degrees before entering the atmosphere to collide with the denser molecules there. Other particles that do not mirror enter the atmosphere and contribute to the auroral display over a range of altitudes. Other types of auroras have been observed from space, e.g."poleward arcs" stretching sunward across the polar cap, the related "theta aurora", and "dayside arcs" near noon. These are relatively infrequent and poorly understood. There are other interesting effects such as flickering aurora, "black aurora" and sub-visual red arcs. In addition to all these, a weak glow (often deep red) observed around the two polar cusps, the field lines separating the ones that close through the Earth from those that are swept into the tail and close remotely.