This is a photograph taken by John Flinn. It shows the comet Hale-Bopp on April 11th, 1997. The Three Sisters (a group of volcanoes located in Central Oregon) can be seen in the foreground. The glow behind the Three Sisters was from a northern lights display in Canada. The volcanoes were illuminated by a partial moon. Hale-Bopp is in the same spot in the sky that the comet Hyakutake was exactly a year previous (near Algol in the constellation of Perseus).
If you click on this image, you will see a larger version of the same image.