Acquired by the Adler Planterium in 2005, John David Mooney's Spiral Gallaxy is sited so that its shadow marks the summer and winter solstices on the northern ground plane, and the equinoxes on the east and west, 2010.
Media Caption
Acquired by the Adler Planterium in 2005, John David Mooney's Spiral Gallaxy is sited so that its shadow marks the summer and winter solstices on the northern ground plane, and the equinoxes on the east and west, 2010.
