Stars of the Canyon
The Moonlight has illuminated The Grand Canyon, a World Heritage Site in northern Arizona, USA. It is the longest canyon on the Earth, a steep-sided gorge carved by the Colorado River steadily in about 17 million year time span. The canyon is 446 km long, ranges in width from about 6 to 29 km and attains a depth of more than 1.6 km (a mile). Notable in the sky above the canyon are stars of constellation Andromeda and at left Cassiopeia in the Autumn Milky Way. The little cloud in the center is our major neighboring galaxy, M31 or Andromeda galaxy, a cosmic island of more than 200 billion stars, located 2.5 million light years away.