This is by far my favourite photo from our November 2006 vacation in Hawaii. The picture is taken from the top of Mauna Kea at sunset. What you are seeing is the shadow of Mauna Kea in the cloud layer which is below us.
If you ever get a chance to visit the Big Island of Hawaii, a sunset expedition up to the summit of Mauna Kea for star gazing is a must. The moonscapes above the tree line are amazing. It feels like you are on another planet.