Ansel Easton Adams (February 20, 1902 – April 22, 1984) was an American photographer and environmentalist best known for his black-and-white landscape photographs of the American West, especially Yosemite National Park.
With Fred Archer, Adams developed the Zone System as a way to determine proper exposure and adjust the contrast of the final print. The resulting clarity and depth characterized his photographs and the work of those to whom he taught the system. Adams primarily used large-format cameras despite their size, weight, setup time, and film cost, because their high resolution helped ensure sharpness in his images.
Adams founded the Group f/64 along with fellow photographers Willard Van Dyke and Edward Weston. Adams’s photographs are reproduced on calendars, posters, and in books, making his photographs widely distributed.
Ansel Adams’s photograph The Tetons and the Snake River has the distinction of being one of the 115 images recorded on the Voyager Golden Record aboard the Voyager spacecraft. These images were selected to convey information about humans, plants and animals, and geological features of the Earth to a possible alien civilization. These photographs eloquently mirror his favorite saying, a Gaelic mantra, which states “I know that I am one with beauty and that my comrades are one. Let our souls be mountains, Let our spirits be stars, Let our hearts be worlds.”
The Vikings (from Old Norse víkingr) were the Norse explorers, warriors, merchants, and pirates who raided, traded, explored and settled in wide areas of Europe, Asia and the North Atlantic islands from the late 8th to the mid-11th century.
These Norsemen used their famed longships to travel as far east as Constantinople and the Volga River in Russia, and as far west as Iceland, Greenland, and Newfoundland, and as far south as Nekor. This period of Viking expansion – known as the Viking Age – forms a major part of the medieval history of Scandinavia, Great Britain, Ireland and the rest of Medieval Europe.
Popular conceptions of the Vikings often differ from the complex picture that emerges from archaeology and written sources. A romanticised picture of Vikings as Germanic noble savages began to take root in the 18th century, and this developed and became widely propagated during the 19th-century Viking revival. The received views of the Vikings as violent brutes or intrepid adventurers owe much to the modern Viking myth which had taken shape by the early 20th century. Current popular representations are typically highly clichéd, presenting the Vikings as familiar caricatures.
The Voyager 2 spacecraft is a 722-kilogram (1,592 lb) space probe launched by NASA on August 20, 1977 to study the outer Solar System and eventually interstellar space. Operating for 34 years, 8 months and 5 days as of today (25 April 2012), the spacecraft receives routine commands and transmits data back to the Deep Space Network.
Part of the Voyager program with its identical sister craft Voyager 1, the spacecraft is currently in extended mission, tasked with locating and studying the boundaries of the Solar System, including the Kuiper belt, the heliosphere and interstellar space. The primary mission ended December 31, 1989 after encountering the Jovian system in 1979, Saturnian system in 1980, Uranian system in 1986, and the Neptunian system in 1989. It was the first probe to provide detailed images of the outer gas giants.
Each Voyager space probe carries a gold-plated audio-visual disc in the event that either spacecraft is ever found by intelligent life-forms from other planetary systems. The discs carry photos of the Earth and its lifeforms, a range of scientific information, spoken greetings from the people (e.g. the Secretary-General of the United Nations and the President of the United States, and the children of the Planet Earth) and a medley, “Sounds of Earth”, that includes the sounds of whales, a baby crying, waves breaking on a shore, and a variety of music.
As the probes are extremely small compared to the vastness of interstellar space, the probability of a space-faring civilization encountering them is very small, especially since the probes will eventually stop emitting any kind of electromagnetic radiation. If they are ever found by an alien species, it will most likely be far in the future as the nearest star on Voyager 1’s trajectory will only be reached in 40,000 years.
Carl Sagan noted that “The spacecraft will be encountered and the record played only if there are advanced space-faring civilizations in interstellar space. But the launching of this ‘bottle‘ into the cosmic ‘ocean’ says something very hopeful about life on this planet.” Thus the record is best seen as a time capsule or a symbolic statement rather than a serious attempt to communicate with extraterrestrial life.