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A recent conversation with a friend about the northern lights got me wondering when the best chance of
seeing them without having to travel far north or travel too far out of Ottawa
would be, as I haven’t had the chance to see them myself yet. My understanding of
aurora borealis was very minimal, but after reading this article I have
expanded my knowledge of how they work, when they occur, and the time to look out for them.
Auroras are caused by the collision between
electrically charged particles from the sun as they enter the earth’s
atmosphere. The colors differ
depending on the altitude of the collisions. For example, I learned that the most common light display is
a yellow-green display coming from oxygen molecules about eighty kilometers
above the earth. Whereas the most rare auroras are produced over three hundred
and twenty kilometers above the earth, and come from nitrogen emissions. This
read also explains why auroras are most visible in the north and south poles
and how they take their winding shapes due to magnetic fields. This article
shares a few interesting legends of the northern lights. These legends were derived from people around the world such as North Americans, Europeans, The
Menominee Indians, and The Maori of New Zealand.
I recommend this article to those like myself who
never chose the northern lights as a project topic in elementary school or
haven’t yet taken the time to read about them.
Brown,
Dave. "The Northern Lights Are What I Long To See." Ottawa Outdoors. N.p., 2012. Web. 15
Nov. 2012.
<http://ottawaoutdoors.ca/index.php?option=com_content&view=article&id=405%3Athe-northern-lights-are-what-i-long-to-see&catid=35%3Aadventure-articles&Itemid=62>.
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