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Auroras - Fire in the Sky (Paperback, 2nd edition)
Loot Price: R410
Discovery Miles 4 100
You Save: R84
(17%)
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Auroras - Fire in the Sky (Paperback, 2nd edition)
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List price R494
Loot Price R410
Discovery Miles 4 100
You Save R84 (17%)
Expected to ship within 9 - 15 working days
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A celebration of nature’s spectacular lightshows, and a visual
feast documenting the kaleidoscopic colours that decorate the sky.
For millennia, humans have been fascinated with the ghostly green
and red curtains of light that shimmer across the heavens on dark,
clear nights. Ancient peoples saw these displays as souls of the
dead, the torches of the spirits and as harbingers of war. Barely
100 years ago, scientists finally learned that an aurora is created
when the Earth’s magnetic field is bombarded with charged
particles from the sun. When the charged particles collide with
oxygen in the atmosphere, auroras with yellows, greens and reds
appear. Collisions with nitrogen result in bluish colours. However,
our understanding of the physics behind auroras has not detracted
from their wonder. Auroras is filled with over 100 photographs of
one of nature’s greatest spectacles, complete with captions that
reflect on the folklore, science and beauty of the northern lights.
The book poses and answers the many scientific questions about
auroras: Why are auroras usually seen only at high latitudes?; How
do scientists study them?; What causes the different colours?; Why
are massive auroras often followed by blackouts and computer system
crashes? Auroras is where cutting-edge science meets the stuff of
dreams.
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