The History of Astronomy By Paola Manzo Franco 30,000 BCE Bone carvings keep track of phases of Moon 4000 BCE Mesopotamians observe space through the tops of their pyramids 2500 BCE Stonehedge has built 2000 BCE Temple of Amen-Ra was built Egypt 200 Hiparchus classifies the stars to their brightness 200 Ptolemy suggested the geocentric theory (the planets and Sun revolved around the Sun) 300 Aristarchus of Samos suggested that the Earth revolved around the Sun Sep 12, 1543 Copernicus published the heliocentric theory ( the planets revolved around the Sun) Sep 12, 1600 Tyco Brahe carried out very detailed observation of the planets. Sep 12, 1609 Galileo used a telescope for the first time Sep 12, 1672 Isaac Newton built the first telescope using mirrors instead of lenses Sep 12, 1687 Newton published a book explaining the laws of the movement of the planet Sep 12, 1705 Edmund Halley explained Newton´s laws and predicted the return of the comet in 1758 Sep 12, 1781 W. Herschel discoverd Uranus Sep 12, 1838 F. W. Bessel measured the distance from a star Sep 12, 1846 Adams, Galle and Leverrier discovered Neptune Sep 12, 1900 Astrophysiscs was foundd thanks to the spectroscope Sep 12, 1927 E. P. Hubble proved that some nebulas are actually galaxies Sep 12, 1930 C. Tombaugh discovered Pluto Sep 12, 1995 Discovery of the first extra-solar planets Sep 2, 2016 NASA approves mission to Mars 2018
