who is nasa's chandra xray observatory named after
Chandra X-ray Observatory Chandra is one of the Great Observatories, along with the Hubble Space Telescope, Compton Gamma Ray Observatory (1991â€“2000), and the Spitzer Space Telescope. The telescope is named after the Nobel Prize-winning Indian-American astrophysicist Subrahmanyan Chandrasekhar.[6] Its mission is similar to that of ESA's XMM-Newton spacecraft, also launched in 1999.
Jantar Mantar, Jaipur The Jantar Mantar monument in Jaipur, Rajasthan is a collection of nineteen architectural astronomical instruments built by the Rajput king Sawai Jai Singh II, and completed in 1734.[1][2] It features the world's largest stone sundial, and is a UNESCO World Heritage site.[1][3] It is located near City Palace and Hawa Mahal.[4] The instruments allow the observation of astronomical positions with the naked eye. The monument expresses architectural innovations, as well as the coming together of ideas from different religious and social beliefs in 18th-century India.[1] The observatory is an example of the Ptolemaic positional astronomy which was shared by many civilizations.[1][2]