The other night I experienced something I've long dreamed of. I finally got to see the Aurora Borealis (Latin for "northern dawn"), aka the Northern Lights, commonly referred to around here as simply "the aurora". It is caused by "solar wind", electrons from the sun drawn to the Earth's magnetic poles, colliding with oxygen and nitrogen molecules high up in the atmosphere, and creating light. Scientifically, it's like a big, natural neon sign. We've been in an "active" period for solar wind the last few days, combined with crystal clear skies for viewing. You wouldn't believe the stars.
The aurora occurs at the lower end about 60-70 miles above the Earth, so you can see it from a lot of spots in the Lower 48 in the right conditions. But being this far north, you get to see it not off on the horizon but right overhead, and even extending behind you (south). Below is the forecast from the first night I saw it. That green band is the active zone, and in full represents a halo around the North Pole. At AuroraCon 4 and above, it extends below Anchorage:
After sunset, looking down to the city lights below:

The following three pictures are all courtesy of one of the dudes I was talking to up there - he and his buddies had some expensive camera gear, and mine just wasn't up to taking pictures in the pitch black. I set my manual settings to the same they were using, and even longer shutter speeds, etc., but my pics didn't come out at all. So, I was very lucky to run into this guy and that he hooked me up. Recall you can click on the pictures for full-size, which I recommend.
When I first got up there, there were long horizontal green bands in the sky, which is by far the most common color (from oxygen):

And several times long vertical spikes appeared all over the place extending from the horizon all the way overhead:
There was one point, around 11:30 or so, where the sky went completely crazy and there were green bands and spikes everywhere, and for about 6 or 7 seconds a reddish-purple section (I believe from nitrogen) started in the west at the base of all the green and shimmered all the way across the sky. That was really thrilling!I got home around 12:30, stayed up for the hour or so it took to get the feeling back into my toes, and was so jazzed about the whole thing it took a long time to get to sleep when I finally went to bed. I went back the next night and there was some activity, but it was much quieter at least while I was up there (I understand it became really active later at night). The next "active" night is Saturday April 5, and if it's clear I'll be out there again. Soon the season will be over until next winter.
Oh, and if anyone can name the movie the title of this post is from, WITHOUT googling it, I'll mail you a nickle. Of course, googling is an acceptable method of discovering what it means. (One entry per person, payment to first 10 entries only. Offer expires 04/15/2008. See official rules. Offer not available in Delaware and Vermont).






















