Sunset-brilliant orange ball sinks below the treeline ushering in darkness for stargazers.
On Saturday night, July 29, I headed out to the Medina County Park System’s Letha House Park for a little stargazing and photography. The Cuyahoga Astronomical Association was hosting a public star party and it seemed a good occasion to try some Milky Way photography from their “dark sky” site.
Moonshot, July 29, 2017.
Following a beautiful orange sunset, I shot photos of the assembling sky watchers. I had not planned to shoot photos of the Moon but the waxing crescent dominated the sky with its bright presence. I installed the 2X telephoto adapter to my 400mm lens for a nice 800mm optic. I got decent photos of old Luna but the effort would have benefitted with use of a crop-sensor camera body and its boost in apparent magnification; instead, I was using my full-frame (35mm equivalent) body. I won’t complain too much. The photo looks pretty darned good for an image made on a whim!
Waiting for the sky to darken enough for Milky Way images, I spoke with several small groups of people and pointed out objects of interest in the dimming sky. Many folks had never looked through a telescope before and were thrilled to be doing so that night! Others were excited to learn the names of a very few constellations, and to see the emerging Milky Way. One couple asked whether I’d ever seen strange, unexplained phenomena in the night sky (UFOs, etc.): strange and wonderful, yes; unexplained, no. It’s a little surprising how many people ask, however.
Milky Way, Moon, and Earth
Sky dark enough, I started recording images of the sky. I used a simple photographic tripod, a 15mm diagonal fisheye lens, and my full-frame Canon EOS 6D, wide open at f/2.8, for various lengths of time. The waxing Crescent Moon drown out most of the Milky Way visually – it looked like an area of cloud spread thinly from the south to overhead – but showed up better in photographs. Near the horizon in the photo above, may be spotted the “Tea Pot” asterism of Sagittarius, and constellation Scorpius on opposite sides of the tree (and Milky Way) at center. The bright star above the Moon is Arcturus.
The streak of a small meteor is captured with the Milky Way as background.
In another shot, concentrating on the Sagittarius area of the sky, I captured a little meteor that I did not see at the time of the exposure! I will definitely want to try shots like this again on moonless nights! Trouble is, however, on the horizon: human-made light pollution! Over the years since the astronomy club built their rural Medina County (Ohio) observatory, light pollution from the city of Medina has grown noticeably worse. My final photo in this post shows just how bad it’s getting. The center of Medina is about 12 miles from the park observatory and the city’s glow is intruding high into the sky. What once was a nighttime glow just above the treeline now extends high above it.
City Lights are erasing the night.
We are losing the glory of the night sky to the form of human environmental pollution that is probably easiest to control and that provide immediate benefits in doing so: turning off unneeded lighting, directing lights downward where they are needed (uses less light and power), and immediately save energy and money. I hope I don’t have to drive farther away from town with each passing year in search of darker skies. I can hope, can’t I?