There are 12 astronomical telescopes on Mauna Kea volcano, of which the largest is 10-meter-diameter Keck telescope (two in the middle).The photo was taken on Dec. 19, 2014 on the peak of Mauna Kea in Hawaii. (Photo by Zhu Wei / Xinhua)

NASA on July 23 announced the discovery of the most Earth-like planet ever found by the astronomer through Kepler space telescope. A Russian investor announced he would provide a total funding of $100 million to physicist Stephen Hawking and other scientists to explore intelligent alien life by large astronomical telescope and other equipment. The large astronomical telescope is seldom noticed by people although it plays an important role in exploring the universe by the human.