The 158-inch Mayall Telescope at the Kitt Peak Observatory isn't the largest telescope; it wasn't even the largest when it was built. (The 200-inch Hale Telescope at Mount Palomar is older.) It is used primarily for observations in the infrared spectrum.
Mt Graham largest on Earth, although they are building one now to be completed 2022 that will be the largest when done.
the first telescope built by NASA placed into orbit was the hubble space telescope.
the largest telescope ever been put into the orbits is the Hubble space telescope
The Hubble Telescope.
it was built in 1990
More than 10,000 scientists built the Hubble Telescope. They were assigned to work on different parts of the Hubble Telescope.
Better u ask who found that telescope
Currently, the largest optical telescope is the Gran Telescopio Canarias in the Canary Islands, Spain.
There were many scientists who created and built the Hubble Telescope under the auspices of NASA. The telescope was named after Edwin Hubble, an astronomer in the early 1900s.
Galileo.
NASA