Title:[0699] Earth from space Caption: Earth imaged from a distance of 40,000 km by the crew of the Apollo 17 Moon mission in 1972. Antarctica is at the bottom and the entire continent of Africa is visible. Copyright: Credit:National Optical Astronomy Observatories

Title:[0409] Apollo 11 view of Earth from space Caption:The Earth, not quite fully illuminated, imaged from space by the Apollo 11 crew. The continent of Africa dominates the view. Copyright: Credit:NASA

Title:[1519] Close-up of clouds from space Caption:A close-up of cloud-tops taken from space by the Apollo 11 crew. Copyright: Credit:NASA

Title:[0284] Apollo 16 view of Earth from space Caption:A good view of the Earth photographed about one hour after translunar injection on April 16, 1972. Although there is much cloud cover, much of the United States, most of Mexico and some of Central America are clearly visible. Copyright: Credit:NASA

Title:[0706] Gulf of Mexico Caption:Gulf of Mexico. Copyright: Credit:National Optical Astronomy Observatories

Title:[0385] Whole planet view Caption:Whole Earth Copyright:(c) ESA/PLI/Science Photo Library Credit: