I arrived at the Mammoth Hot Springs campground late Wed. afternoon. Since it was a clear night I decided to drive up to the Upper Terraces, above the hot springs to see if I could see the Aurora. Yes! The Milky Way was also visible.
One of the things discussed with a good friend was how unique it would be to photograph the hot springs with the Milky Way above them. On Wed. night that opportunity was at hand. The ambient light did a fine job of lighting the hot springs, the steam clouds make them a bit blurred, but add to the effect.