It was a perfect night at a dark site in southern Alberta. The Milky Way shone to the south and aurora danced to the north.
I had scouted out this location in June and marked it on my calendar to return in the fall when the centre of the Milky Way would be well-placed to the southwest.
The site is Police Outpost Provincial Park, named for the North West Mounted Police fort that once occupied the site, guarding Canada’s sovereignty in the late 1800s.
One result from the night of shooting is the opening image, the first frame from a time-lapse taken while deep blue twilight still coloured the sky. The main peak is Chief Mountain in Montana.
To the north an aurora display kicked up over the lake. While it never got very bright, it still provided a photogenic show over the still waters.
The waters were calm on this windless night (rare for southern Alberta), and so reflected the stars and Northern Lights beautifully.
Here, the Big Dipper reflects in the lake as we look north to the Lights. The movie below compiles still images and two time-lapse sequences, of the Lights and Milky Way. The sounds are the natural sounds I recorded on site, as flocks of geese were getting ready to migrate and the owls hooted.
Enjoy! — As always, for the best view, enlarge to full screen or click through to Vimeo with the V button.
At equinox the Sun sets due west and shines into the eyes of drivers heading west into the sunset.
This was the scene Friday night on Highway 1, heading to Banff out of Calgary. I set up beside the highway to catch the scene of the Sun going down at the end of the road. I was hoping for more smoke and haze to dim the Sun to a clearly defined disk rather than deal with a bright glow. But you shoot what the sky gives you.
This is one frame from a 315-frame time-lapse movie of the traffic madly moving down Highway 1 (a true to life recording!) and the Sun glow setting behind the Rockies.
Saturday night was a fine evening for witnessing the geometry of the night sky.
This is sunset on the evening of the autumnal equinox, September 22, 2012, with a first quarter Moon in the sky. The image illustrates the geometry of the quarter Moon’s position, which is always 90° away from the Sun, a quarter of the way around its orbit in its monthly cycle.
In this case, because the Sun (at right) was on the equinox position on the ecliptic, it was setting due west this night (something it does only on the dates of the fall or spring equinox). This put the quarter Moon (at left) 90° away, due south at sunset.
Draw a line from the Moon to your eye (the camera) and then back out to the Sun and it forms a 90° right angle. This geometry holds true for any quarter Moon, but being equinox the Sun and Moon were nicely aligned due west and south, making their right angle arrangement more obvious.
I took this shot from the grounds of the Rothney Astrophysical Observatory on the occasion of their monthly Open House.