May 1, 2012
On the South Rim May 20, rangers, amateur astronomers and NASA scientists will assist visitors with viewing of the annular eclipse and the night sky afterward.
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On Sunday, May 20, 2012, visitors to both rims of Grand Canyon National Park will be able to view a rare annular eclipse of the sun. The western two-thirds of the country and the southern two-thirds of Arizona will see at least a partial eclipse prior to sunset, but visitors to Grand Canyon National Park will see the moon pass fully in front of the sun, leaving only a ring (or "annula") of sun visible around it.