Depends on how specific we are talking about. The inner core of the earth is approximately 5000 degrees celsius, or 9032 Fahrenheit, Itâs the hottest area in the earth. The outer core is 5000 - 3700 degrees Celsius, or 9032 - 6692 Fahrenheit, Itâs very hot magma, and the second hottest part of the earth. The Inner mantle is about 3700 - 1600 Degrees Celsius, or 6692 - 2912 Fahrenheit, Itâs the third hottest.
Where is the largest optical telescope in the world? The largest optical telescopes in the world are the W. M. Keck telescopes on top of the dormant volcano Mauna Kea in Hawaii. At an elevation of 13,800 feet, the Keck telescopes are above much of the cloud cover. The two Keck telescopes each have a diameter of 33 feet!
The U.S. National Observatories. In the late 1950's, the National Science Foundation, in cooperation with astronomers at universities across the United States, established national observatories to provide ground based telescope facilities for research in both optical and radio astronomy.he largest public access optical-infrared telescopes in the U.S. the twin 8-m telecopes that comprise the Gemini Observatory, an international partnership. One telescope is locate on Mauna Kea in Hawaii, while the other is located on Cerro Pachon in Chile, giving astronomers access to the entire sky.