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List of experiments : ウィキペディア英語版 | List of experiments
:''See also: timeline of scientific experiments and List of discoveries'' The following is a list of historically important scientific experiments and observations demonstrating something of great scientific interest, typically in an elegant or clever manner. ==Astronomy==
* Eratosthenes measures the Earth's circumference (240 BC) * Galileo Galilei uses a telescope to observe that the moons of Jupiter appear to circle Jupiter. This evidence supports the heliocentric model, and weakens the geocentric model of the cosmos (1609) * Ole Rømer makes the first quantitative estimate of the speed of light in 1676 by timing the motions of Jupiter's satellite Io with a telescope * Arno Penzias and Robert Wilson detect the cosmic microwave background radiation, giving support to the theory of the Big Bang (1964) * Kerim Kerimov launches Kosmos 186 and Kosmos 188 as experiments on automatic docking eventually leading to the development of space stations (1967) * The Supernova Cosmology Project and the High-Z Supernova Search Team discover, by observing Type Ia supernovae, that the expansion of the Universe is accelerating (1998)
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