Photo of the Week: July 2, 2012

Star trails streak across the night sky overhead the South Sister volcano in the Three Sisters Wilderness near Bend, Oregon.

The above time lapse video clips were each assembled from over 400 still images taken over a 3.5-hour period on a recent overnight mountaineering and photography expedition of South Sister’s twin, Middle Sister.  In the first half of the clip, the Milky Way galaxy can clearly be seen moving over the peak.  I created the streaking star effect in the second half of the clip by cumulatively stacking a series of composite images recording the stars’ apparent movement across the sky relative to Earth’s rotation.

Tomorrow:  Stay tuned for my trip report and summit photos from the top of Middle Sister!  


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