View from up on Ridge one here on ranch. The window to the Big Horns is IFFY this time of year from this far away. My truck/tripod is 130 miles out for this capture off the highest point around the place. The timing on this was mid-Civil Twilight. The sunset is far right off frame looking from the Montana/Wyoming border to the southwest toward the range.
Full Screen is a good choice for this. Twilight over the BigHorns this night was so obviously gorgeous. I had to resort to a short time exposure to catch it. The timing on this sunset is very late in Civil Twilight. When the alpenglow colorcasts the snow on the Mountains, I get interested 👀📸.
Civil Twilight after sunset ends about 28 minutes after the sun goes down 8 degrees under the horizon. It’s usually the best time to get those crimson and yellow skies. Orange here is a mixture. Atmospheric Ice causes this phenomena caused by refracted light passing through. Only the red wavelengths which have survived through hundreds of miles of atmosphere light the cloud deck.
The long lenses I use crush the perspective of distance. I’m almost always using telephotos to bring in just the BigHorn Mountains filing the whole frame. It takes about a 800 mm long focal length to fill the camera frame side to side with the tallest part of the range. The black ridge at the bottom is 40 miles out. The clouds behind the range are around 200 miles out I would suspect. The distance is hard to put into proper frame. Those 13000 feet high mountains appear smaller than the thumb on my outstretched arm from here.
Mirage Over the BigHorns (They don’t look like that)….
Fata Morgana = Complex Mirage
Often observed over large patches of snow/ice at low uniform temperature. Sounds like here lolol… A Fata Morgana is a pretty rare event in my experience. I’ve never seen this before but it can occur anywhere. There is no limitation for temperature though as they can occur on hot days. This was not a hot day lolol.
Fata Morgana is described as a very complex “superior” form of mirage. It will have three or more distorted erect and inverted images . All within the primary mirage. Changes of the constantly variable conditions of the atmosphere cause it to change form rapidly. A Fata Morgana may change in infinite ways within just a few seconds, Including changing to become a straightforward superior mirage. A superior mirage occurs when the air under the line of sight is colder than the air above it. This unusual arrangement is termed ” temperature inversion”. Warm air above cold air is the opposite of the normal temperature gradient of the atmosphere during the daytime. That obviously was the case here.
Seen from sea level to mountain tops, this phenomena has even been seen from aircraft. I’ve never ever experienced this in 20 years of living up here. Now the Big Horn Mountains are 130 miles distant. That is one long distance mirage. About 200 miles line of sight past the Big Horns are the Wind River Mountains. The strange slopes COULD be from the Wind River Slopes showing in the mirage. Alternately, the mirage COULD be Multiplying and stacking in several layers the slopes of the Big Horns themselves. (Educated Speculation at best).
“Atmospheric ducting” of light causes this. The lensing created by bending the light rays in an arc equal to the curvature of the earth. Proper Positioning is necessary to see this. Being JUST below or actually in the atmospheric duct is necessary to see the Fata Morgana Mirage.