This photograph started with a mistake. I created this photograph of Mount Wheeler in Great Basin National Park a few days ago, but I first photographed this scene back in June.
I messed up my first attempt because I had the wrong ISO setting which produced an image that was too dark. I thought my ISO was set much higher than it was, and everything looked fine in the LCD on location, but because of the bad setting, I had to raise the exposure significantly in post-processing. The photograph became too noisy and was not going to make a large, high quality print. But I loved the photograph. I thought the composition was good, and the photograph came out beautifully otherwise. So I wanted to recreate this image.
To recreate the photograph, I needed to go back to the same location later in the summer, but I wanted the Milky Way to be in the same location in the sky at that time. This timing needed to be coordinated with the moon phase and the moonrise/moonset time because the light of the moon creates light pollution, making it difficult to capture the Milky Way. The best time to go is during a new moon when then the moon is not in the sky at all for the entire night. So my next opportunity was going to be one month later, in July. The next question was what time of night would I need to be there to get the same composition?
Many software programs are available for mapping the night sky based on time and location. I use one called Night Sky Tools. With this program, I enter coordinates and a date and time. The program then shows me what the sky looks like at that time in that location. So to plan my photograph, I entered the coordinates of Great Basin National Park. Next, I entered the date in June when I was there. Finally, since I created my photograph between 12:15 and 12:30 AM, I entered that time as well. With these inputs, I saw that I was pointed just west of south when I was making my photograph. That gave me a reference. I knew where I needed the Milky Way to be located relative to due south one month later when the next new moon would occur.
Next I entered the date I planned to return to Great Basin. Then I adjusted the time until the Milky Way was in the same location relative to due south as in my photograph. That time was around 10:15 PM, almost two hours earlier. That would work, because it would be dark by then, and the twilight would be over. The moon would not be out, and the skies would be completely dark. So I planned to return in July to make my photograph. Because it was a new moon and I would be finished making my photograph by 10:30 or so, that would leave lots of time and dark skies for me to try to find some additional compositions in the park.
There was one more factor that had to be accounted for, however, and that was the weather. As the date of my trip approached, Hurricane Dolores was raging in the Pacific Ocean. When it was time for my trip to Great Basin, the hurricane had weakened to a low pressure system over the western United States. In Las Vegas and areas north, including Great Basin, we had cloudy skies and rain. Bad weather often creates excellent photographic opportunities, but not when you’re trying to photograph the night sky. I canceled my trip and went back to the drawing board.
I started to make plans for the next month, August. Now the timing was becoming difficult. The Milky Way was going to be in position earlier and earlier the later in the year I waited, so I did not want to wait until the next new moon. I decided to check the sky one week earlier, when the moon was in its last quarter. According to the calendar, the moon would not rise until after midnight, and according to Night Sky Tools, the Milky Way was going to be in position between around 9:15 and 9:30 PM. That was perfect, but this was my last opportunity for the year. By September, the Milky Way would be in position much too early and the sun or at least twilight would be polluting the darkness of the sky.
So, after a lot of planning and a couple obstacles along the way, I returned this past weekend to create this photograph of the Milky Way over Mount Wheeler in Great Basin National Park. It was an adventure, but it was worth it, and I’m happy I can now share this photograph with you.
About 30 minutes later, I moved to a different location and made one more photograph. The clouds were racing in, so I was lucky I got my first photograph. As the clouds approached, however, I thought it would be interesting to photograph them with the Milky Way. The photograph below is the result.