Astronomers have begun to blast 3 million cubic feet of rock from a mountaintop in the Chilean Andes to make room for what will be the world’s largest optical telescope when completed near the end of the decade. Australia, through The Australian National University and Australian Astronomy Ltd, is a founding partner in the project, and the Australian Government has invested $88.4 million in the $700 million project.
The telescope will be located at the Carnegie Institution’s Las Campanas Observatory – one of the world’s premier astronomical sites, known for its pristine conditions and clear, dark skies. Over the next few months, more than 70 controlled blasts will break up the rock while leaving a solid bedrock foundation for the telescope and its precision scientific instruments.
Photo by Francisco Figueroa / GMTO.
The Giant Magellan Telescope (GMT)will have unprecedented capabilities, allowing it to peer back to the dawn of time, witnessing the birth of the first stars, galaxies and black holes, while also exploring planetary systems similar to our own around nearby stars in the Milky Way. The GMT will help astronomers probe the nature of Dark Matter and Dark Energy, mysterious forms of matter and energy that allow galaxies to form while the expansion of the Universe accelerates.
At a ceremony on the mountaintop, Dr Wendy Freedman, Director of the Carnegie Observatories and Chair of the Giant Magellan Telescope Organization said, “Today marks a historic step toward constructing an astronomical telescope larger than any in existence today. Years of testing have shown that Las Campanas is one of the premier observatory sites in the world and the Carnegie Institution is proud to host the GMT.”
Dr Charles Alcock, Director of the Harvard-Smithsonian Center for Astrophysics, at the mountaintop ceremony said, “The GMT will play an important role in helping us understand the Universe and our place in the cosmos.”
The Giant Magellan Telescope is being built by a consortium of institutions from the US, South Korea and Australia with funding from both private and public sources. To date 40 per cent of the telescope’s ultimate price tag has been committed and active fundraising is underway to secure the remaining funds.
Dr Matthew Colless, Director of the Australian Astronomical Observatory said, “Astronomers from Australia, and countries around the world, travel to Las Campanas to make use of its dark, clear skies that produce images as sharp as anywhere on Earth. It is fitting that the world’s largest telescope be located at this superb site.”
In January of this year the partners cast the second of GMT’s seven 28-foot diameter primary mirror segments at the University of Arizona’s Steward Observatory Mirror Laboratory. The seven primary mirrors, each weighing 20 tons, are the heart of the giant telescope, providing nearly 4000 square feet of light-gathering area.
Optical scientists at the Mirror Lab are putting the finishing touches on the first mirror segment, whose surface now matches its optical prescription to better than one millionth of an inch. Dr Patrick McCarthy, the GMT Project Director, said, “2012 is a banner year for the GMT project as we complete the design process, develop the primary mirrors and begin work on the site in Chile.”
The GMT partner institutions are the Carnegie Institution for Science, The Australian National University, Astronomy Australia Limited, Harvard University, the Korea Astronomy and Space Science Institute, The Smithsonian Institution, Texas A&M University, the University of Arizona, the University of Chicago, and the University of Texas at Austin. More information regarding the GMT project and Las Campanas Observatory can be found at: www.gmto.org.
Australian GMT Technical Program Manager Roger Franzen, from the Research School of Astronomy and Astrophysics (RSAA) at ANU said the GMT would enhance the world-leading research already performed at the University’s Mt Stromlo Observatory.
“Australia has more than just an observing partnership with the GMT. Astronomers in Australia and around the world are unanimous in their belief that the current boundaries in cosmology, planetary science and astrophysics in general can only be expanded by the use of Extremely Large Telescopes (ELT) like the GMT.”
“It is, therefore essential that Australia is a participant and has the engineering capability and capacity to realise the next generation of instrumentation like that to be built at Mt Stromlo.
“The Australian Government’s committment to the project will permit Australian astronomers to have both a 10 per cent share of the GMT as well as to build critical infrastructure, capability and capacity in this technologically challenging field,” Mr Franzen said.
Australian National University