1800 BC - Babylonian star catalog\n* 1700 BC - Stonehenge\n* 432 BC - Athens observatory on Lycabettus Hill used by Meton and Phaeinus\n* 350s BC - Eudoxus of Cnidos observatory, school at Cyzicus\n* 350 BC - Shin Shen's star catalog has almost 800 entries\n* 330 BC - AristotleOn the Heavens [De Caelo]\n* 200 BC - Astrolabe used by Greeks\n* 150 BC - Rhodes observatory\n* 129 BC - Hipparchus' star catalog\n* 105 BC - Alexandria observatory and College of Technology under Heron \n* 52 BC - Shou-chang uses armillary ring
ca. 60 - Geminus Introduction to Celestial Phenomena\n* 141 - Claudius PtolemyMegale Mathematike Syntaxis [or Almagest]\n* 499 - AryabhataAryabhatiya\n* 646 - Cheomseongdae astronomical observatory near Kyongju, South Korea (formerly Silla)\n* 790 - Gundishapur observations by al-Nihawandi\n* 813 - Baghdad School of Astronomy\n* 828 - al-Shammasiyya observatory of Abi Mansur near Baghdad\n* 831-2 - Mount Qasiyun observatory near Damascus\n* 840 - al-FarghaniCompendium of the Science of the Stars\n* 887 - Raqqa observatory of al-Batani in Syria\n* 963 - al-Sufi's star catalog Book of the Fixed Stars\n* 988 - Baghdad observatory of al-Quhi and al-Buzjani\n* ca. 900 - Hanlin Academy observatory in Northern China\n* 994 - Ray observatory of al-Khujandi near Tehran, Iran\n* 1000 - Mokattam observatory, Egypt for al-Hakim bi-Amr Allah\n* 1023 - Hamadan observatory\n* ca. 1030 - Treasury of Optics by Ibn al-Haytham of Egypt [Alhazen]
\n* 1705 - Berlin Observatory\n* 1724 - Indian observatory of Sawai Jai Singh at Delhi\n* 1725 - St. Petersburg observatory at Royal Academy\n* 1732 - Indian observatories of Sawai Jai Singh at Varanasi, Ujjain, Mathura, Madras\n* 1733 - Chester Moor Hall invents the achromatic lens refracting telescope\n* 1734 - Indian observatory of Sawai Jai Singh at Jaipur\n* 1758 - John Dollond reinvents the achromatic lens\n* 1789 - William Herschel finishes a 49-inch optical reflecting telescope, located in Slough, England\n* 1761 - Joseph-Nicolas Delisle 62 observing station network for observing the transit of Venus\n* 1769 - Short reflectors used at 63 station network for transit of Venus
1957 - Bernard Lovell and his group complete the Jodrell Bank 250-foot steerable radio telescope\n* 1957 - Peter Scheuer publishes his PhD method for obtaining source counts of spatially unresolved sources
1993 - Keck 10-meter optical/infrared reflecting telescope begins operation, located at Mauna Kea, Hawaii\n* 1997 - The Japanese Halca satellite begins operations, producing first VLBI observations from space. 25000 km maximum baseline\n* 1998 - First light at VLT1, the 8.2 m ESO telescope.