
Here’s a shot of the northern lights, or aurora borealis, I took from just near McCarthy, in Wrangell St. Elias National Park, Alaska.
I was guiding a photo tour into the park, and we were late leaving Anchorage, due to delays with one of the guest’s flight to Alaska.
What Are the Northern Lights?
Wikipedia says this about the northern lights:
“Auroras are now known to be caused by the collision of charged particles (e.g. electrons), found in the magnetosphere, with atoms in the Earth’s upper atmosphere (at altitudes above 80 km). These charged particles are typically energized to levels between 1 thousand and 15 thousand electronvolts and, as they collide with atoms of gases in the atmosphere, the atoms become energized. Shortly afterwards, the atoms emit their gained energy as light. Light emitted by the Aurora tends to be dominated by emissions from atomic oxygen, resulting in a greenish glow (at a wavelength of 557.7 nm) and – especially at lower energy levels and at higher altitudes – the dark-red glow (at 630.0 nm of wavelength). “
Make sense? There you have it folks – the northern lights are tiny little things in the air, like dust, so small we can’t even see them, that glow because they crash into other tiny little things we can’t see. How cool is that?
Continue reading







