This is a pass of the International Space Station on Easter Sunday, April 24, 2011, as it came overhead then flew away to the east. It passed north of the handle of the Big Dipper (at top) then past the stars of Bootes, including Arcturus (at right) in deep twilight.
This is a stack of thirteen 15-second exposures at f/4 with the Canon 15mm lens and Canon 7D camera at ISO 400. The 1-second intervals between exposures created the gaps in the trail which give a sense of the craft slowing down in its apparent motion as it flies away toward the horizon.
The Amazing Sky 