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The mission was a joint work of NASA with the German and Italian space agencies. [2] [3] Each of the week long mission scanned about 50 million square kilometers of the Earth's surface, (19.3 million square miles). [4] The SIR mission revealed hidden river channels in the Sahara Desert indicating significant climate change in the past. [5]
Earthrise, taken on December 24, 1968, by Apollo 8 astronaut William Anders. Earthrise is a photograph of Earth and part of the Moon's surface that was taken from lunar orbit by astronaut William Anders on December 24, 1968, during the Apollo 8 mission.
First movie of Earth from space made without a human camera operator (contrast to Titov's 1961 movie) [35] April 24, 1967 [36] Surveyor 3: First images and view of a sunset and sunrise over Earth at the same time, a solar eclipse by Earth (a celestial body other than the Moon), from the Moon's surface. [37] [38] April 30, 1967
500 million years of climate change Ice core data for the past 400,000 years, with the present at right. Note length of glacial cycles averages ~100,000 years. Blue curve is temperature, green curve is CO 2, and red curve is windblown glacial dust (loess).
The 5,900-kilogram (13,000 lb) satellite was deployed from Space Shuttle Discovery during the STS-48 mission on 15 September 1991. It entered Earth orbit at an operational altitude of 600 kilometers (370 mi), with an orbital inclination of 57 degrees. The original mission duration was to be only three years, but was extended several times.
These satellites are used to monitor short-term weather, long-term climate change, natural disasters. Earth observations satellites provide information for research subjects that benefit from looking at Earth’s surface from above (such as meteorology, oceanography, terrestrial ecology, glaciology, atmospheric science, hydrology, geology, and ...
The datasets compiled by ACRE will be used to test new climate change models, [8] provide data for climate research, for policy makers and for teaching. The 20CR dataset has already been utilized in several significant research projects, An analysis of global warming based on barometric data, [9]
From ancient times, people suspected that the climate of a region could change over the course of centuries. For example, Theophrastus, a pupil of Ancient Greek philosopher Aristotle in the 4th century BC, told how the draining of marshes had made a particular locality more susceptible to freezing, and speculated that lands became warmer when the clearing of forests exposed them to sunlight.