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The history of astronomy focuses on the contributions civilizations have made to further ... First discovered in 1991, its significance was only clear after results ...
The Hubble Space Telescope, the first large optical telescope in orbit, is launched using the Space Shuttle, but astronomers soon discovered that it is crippled by a problem with its mirror. A complex repair mission in 1993 allows the telescope to start producing spectacular images of distant stars, nebulae, and galaxies.
Galileo [9] [10] discovered the Galilean moons. These satellites were the first celestial objects that were confirmed to orbit an object other than the Sun or Earth. Galileo saw Io and Europa as a single point of light on 7 January 1610; they were seen as separate bodies the following night. [11] Callisto: Jupiter IV o: 8 January 1610 p: 13 ...
1522 – First circumnavigation of the world by Magellan-Elcano expedition shows that the Earth is, ... the first asteroid moon discovered. ... History of astronomy;
First exposition of the rocket equation based on Newton's third law of motion: Treatise on the Motion of Rockets. UK: William Moore: 1840 First clear telescopic photograph of another world: the Moon. United States: John William Draper: 1845 First proper observation of other galaxies which are termed "whirlpool nebulae". UK: William Parsons: 1861
1995 – The first planet around a Sun-like star is discovered, in orbit around the star 51 Pegasi. [99] 1996 – The first Hubble Deep Field is released, providing a clear view of very distant galaxies when the universe was around one-third of its present age.
1781: William Herschel announces discovery of Uranus, expanding the known boundaries of the Solar System for the first time in modern history. 1785: William Withering: publishes the first definitive account of the use of foxglove for treating dropsy. 1787: Jacques Charles: Charles's law of ideal gases.
The first successful flyby of Mars was made by Mariner 4 in 1965. Mariner 10 first passed Mercury in 1974. The first probe to explore the outer planets was Pioneer 10, which flew by Jupiter in 1973. Pioneer 11 was the first to visit Saturn, in 1979.