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!
Many celestial phenomena can be seen at more than one wavelength. 1  Optical telescopes can be used on Earth and in space. An example of a huge optical telescope in space is the Hubble Space Telescope through which astronomers can look out across the Universe without the distortion of light by the Earth's atmosphere. The first optical telescope was created 400 years ago, while the other kinds of telescopes were invented in the 20th century.