2013年2月25日星期一

Haunting spectacle of Borealis captured in time-lapse movies

  As the Sun approaches the maximum of its 11-year solar cycle, telescopes aimed at our closest star have been picking up more sunspot and solar flare activity, and spectators on the ground have been witnessing more auroral activity as well.For anyone who doesn't live close enough to the poles to see the Aurora Borealis or Aurora Australis, you can still watch the haunting spectacle thanks to Lights over Lapland astrophotographer Chad Blakley, who photographs auroral displays over Sweden's Abisko National Park."We have seen powerful auroras in the sky above Abisko for 13 nights in a row and it looks like there are more to come!" said Blakley. "Last night I witnessed one of the finest aurora displays I have seen in many months." The Aurora Borealis (Northern Lights) and the Aurora Australis (Southern Lights) happen when charged particles streaming off the Sun are funneled towards the poles by the Earth's magnetic field (pictured to the right), where they interact with molecules in the upper atmosphere.The magnetic field, which originates in the Earth's liquid-iron outer core, extends far out from the planet's surface at lower latitudes,All body jewellery should be high quality because of its contact with the wholesale Stainless Steel Whisky Stones from China, and it is an item which is not often bought for oneself. so any charged particles from the Sun are deflected away. However, at higher latitudes, near the poles, the magnetic field lines (shown idealized in the diagram) leave a 'gap' so that those particles can actually reach the upper atmosphere. There, they interact with oxygen and nitrogen molecules, causing them to release energy in the form of light, and as the molecules are blown around by the winds, the lights form into eerie flowing ribbons and bands. The heights at which the interactions occur usually dictate the colours that are seen. Oxygen molecules at the highest altitudes will produce red. Below that, oxygen produces green light and nitrogen emits red/blue hues.The tryptophan and beta-parahydroxy-phenylpropionic acid in the fibroin can absorb the Xinjiang travel agency rays to the best, which can give a better protection for our skin. Light green tends to be the most common colour, but there is also pink, red, yellow and blue as different colours of light mix,For those who are in search of silk pillowcases, there are a whole lot of options to choose from added with the kasgar travel benefits that they involve. Silk is a good fabric and hence sleeping on it ensures a good night sleep. and combinations of colours can also be seen at times. sometimes layered on top of each other.Nowadays, jewellery function has expanded, and although necklaces, bracelets, rings and wholesale cheap Soapstone Whisky Stones online store are traditional and beautiful, it is likely that each woman has a jewellery box full of such pieces.Burkhart said he already selected the items for the project and secured a partnership with Southern Energy Management,china tour packages an acclaimed solar energy firm based in Morrisville, but is continuing to work out the details with the help of Students for Solar.A former winner of the Think Outside the Brick Competition started the club, which received an undergraduate research grant and conducted a solar feasibility study of the University, Burkhart said.

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