Square Kilometre Array (SKA)
The Square Kilometre Array or, as it’s known in the industry, the SKA, is one of the new topics that we are covering in our shows this year.
No it’s not the resurrection of Ska music but an international project to build the word’s largest radio telescope. But we’re not talking about just one REALLY big dish. Instead, the SKA will be made up of around 3000 dishes and other types of antennae that will be linked together in an ‘array’, spreading out across thousands of kilometres. If you add up the surface area of all these dishes you will get a total collecting area of one square kilometre!
So the name isn’t very imaginative, but the telescope’s power will be pretty inspiring as it will be fifty times better than the best telescopes around today.
Why do need do we need such a powerful radio telescope? The SKA will be like a giant ear, listening to the faintest radio whispers from the depths of space and time. It will help us to better understand our universe, look back to the Big Bang, and see the first stars form. If there is other intelligent life out in the Universe, the SKA will give us the best chance of detecting it!
What’s really exciting is that the SKA could be built in our backyard! Australia (in partnership with New Zealand) has been shortlisted as one of two possible sites with the right conditions for the SKA to be located. For example, all radio telescopes need a ‘radio quiet’ zone around them, far away from towns, mobile phones and all the other ‘radio noise’ that modern civilisation creates. The Murchison Shire in WA is extremely radio quiet, as there are no towns and very few people in that area.
South Africa has also been shortlisted to host the SKA, and a site decision is expected in early 2012.
To find out more about this topic, catch a Smart Moves show in an area or school near you or visit www.ska.gov.au
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