Feature Giant Telescopes of the 20th Century Jeff Hecht Two mountaintop telescopes in California—landmark engineering accomplishments of the past 100 years—revealed the expanding universe beyond our galaxy and reached billions of light years into the cosmos. (Top) The Andromeda Galaxy. (Bottom) Aerial view of Mount Wilson Observatory in the San Gabriele Mountains, Calif., 1931. [Davide De Martin, Palomar Observatory / University of Chicago Library] The start of the 20th century was an awkward moment for astronomy. The world’s three largest telescopes were all out of commission. It wasn’t for a lack of interest in astronomy. The big telescopes just didn’t work well—and seeing was poor at most observatories.… Log in or become a member to view the full text of this article. This article may be available for purchase via the search at Optica Publishing Group. Optica Members get the full text of Optics & Photonics News, plus a variety of other member benefits. Publish Date: 01 April 2017 Add a Comment Please enable JavaScript to view the comments powered by Disqus.
(Top) The Andromeda Galaxy. (Bottom) Aerial view of Mount Wilson Observatory in the San Gabriele Mountains, Calif., 1931. [Davide De Martin, Palomar Observatory / University of Chicago Library]