An artist's impression of the small dishes and focal plane arrays used in design of the Square Kilometre Array.
Credit: XiloStudios
SYDNEY: Australia and New Zealand announced a joint bid for a giant radio telescope project that will reach for the earliest traces of the universe and further our search for alien life.
The antipodean neighbours said their joint A$2.5 billion dollar (US$2.1 billion) bid was one of two on the shortlist for the international Square Kilometre Array (SKA), a project which will use 4,000 smaller telescopes as a single device to tap into deep space (see Array for Australia?, Cosmos Online).
Top project
"The SKA project promises to be a top global science project of the 21st century, using one of the world's most powerful computers to explore fundamental questions in science," said New Zealand Economic Development Minister Gerry Brownlee.
The array, which experts hope will be able to see back to the formation of the first stars, was one of the world's most significant "mega-science" projects, said Brownlee, who signed the formal agreement in Sydney on Friday.
Australia's Science Minister Kim Carr said the joint bid proposed erecting 4,000 antennas that would stretch 5,000 km from Australia's west coast to New Zealand, and described the trans-Tasman involvement as "crucial".
A final decision on whether Australia and New Zealand or rival bidder South Africa will host the SKA will be made in 2012, and construction will take between six and eight years, the ministers said. Australia has already outbid Argentina, China and the United States to make the final two.
Remote advantage
One advantage of having the array in Australia is that more stars are visible in the Southern Hemisphere than the Northern. Australia's relative isolation from light pollution, and large expanses of desert, are further plus points.
A global consortium involving more than 50 institutions from 19 countries was driving the SKA programme, and finance for the project was expected to come from international partner governments, they added.
The SKA would be 10,000 times more powerful than current instruments and would aim to answer fundamental questions about the universe, including whether there was intelligent life beyond Earth and what happened after the Big Bang.
It would also explore questions of gravity and magnetism, and how galaxies were born and evolved against the backdrop of "dark energy" that fills the universe, the ministers said.
