The Moon is thought to have formed when an object roughly the size of Mars hit the Earth. The impact was so violent that it threw large amounts of the Earth's mantle into orbit. This material evenually coalesced and formed the Moon.
Ansel Easton Adams was an American photographer and environmentalist. His black-and-white landscape photographs of the American West, especially Yosemite National Park, have been widely reproduced on calendars, posters, and in books.
The Sierra Club's Ansel Adams Award for Conservation Photography was established in 1971, and the Ansel Adams Award for Conservation was established in 1980 by The Wilderness Society. The Wilderness Society also has a large permanent gallery. of his work on display at its Washington DC Headquarters.