To date, the LZT is largest, although India, Belgium and Canada are building the International Liquid Mirror Telescope (ILMT), a 4-meter project which should see completion by March.
"The day is not so far off when the mysteries of the dark ages of the Universe and the physical properties of the first galaxies will be revealed, " Masanori Iye, the leader of the Thirty Meter Telescope project at the National Astronomical Observatory of Japan, said in a statement.