[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [The Astronomical Observatories of Jai Singh](https://indike.org/pramana/ins.science.kaye-1918) › c4.s2.13 # The Astronomical Observatories of Jai Singh c4.s2.13 The Astronomical Observatories of Jai Singh c4.s2.13 - **Language:** English ### [c4.s2.13](https://indike.org/pramana/ins.science.kaye-1918.c4.s2.13) ¹ The Paris observatory is 0° 9' 20.9 secs = 2° 20' 13.5" E. of Greenwich. Jaipur observatory is 75° 49' 18.5" E. of Greenwich, while Delhi observatory is 77° 13' 5" E. The approximately correct latitudes are Delhi 28° 37' 35" N., Jaipur 26° 55' 27" N. In the latter part of the seventeenth century the difficulty of chromatic aberration was partially overcome by the use of very long telescopes—often a hundred feet or more. This led to 'aerial telescopes' without tubes of which la Hire in 1715 gave a description possibly Father Boudier's was a small one of this type. - [Previous: c4.s2.12](https://indike.org/pramana/ins.science.kaye-1918.c4.s2.12) - [Next: c4.s2.14](https://indike.org/pramana/ins.science.kaye-1918.c4.s2.14) - [Up: c4.s2](https://indike.org/pramana/ins.science.kaye-1918.c4.s2) --- Source: [https://indike.org/pramana/ins.science.kaye-1918.c4.s2.13](https://indike.org/pramana/ins.science.kaye-1918.c4.s2.13) · Pramāṇa