09/03/2026
The first Milky Way Arch picture I ever completed. Here we have the Summer Milky Way Arching over Mt Lassen and Lassen Volcanic National Park.
I took this picture after hiking to the top of Brokeoff Mountain which is the highest remaining spot of an ancient eroded volcano and that has exceptional views of Lassen Peak and the rest of the national park and really everywhere within about a hundred miles. I'd decided to hike to the top of it and stay the night to take pictures because I wanted to catch Andromeda galaxy rising over Lassen. After watching that I realized I should be able to get the shots to make a full 360 degree panorama including the beautiful night sky. This is a stereographic reprojection of that image that lets you see a really wide angle view allowing it to look like the Milky Way is a gorgeous arch. I really love how on this night not only was the Milky Way so beautiful and clear but that there was an intense banded airglow causing the image to be full of brilliant green and red colors in the sky. The reason for airglow is much the same as aurora or a neon light. Excited atoms emitting light of very specific wavelengths. The only difference is the reason for the energy. For a neon light, it's an electrical current you pass through it. For the aurora it's high energy particles from the sun channeled down through the atmosphere near the poles by Earth's magnetic field. For airglow it's natural chemical processes occurring in the atmosphere and it is much dimmer...but on a really great night...it looks fantastic in a long exposure picture and can even be seen as a faint haze by eye if you know what you're looking for.