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Square Kilometer Array - Construction Of The World's Biggest Radio Telescope Starts

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On Monday, construction began on Australia's portion of what will ultimately become one of the most powerful radio telescopes in the world: a massive network of antennas in the Outback.

The Square Kilometre Array (SKA) will be a gigantic device that combines antennas in Australia with a network of dishes in South Africa to better understand the origins of stars, galaxies, and potential alien life.

The concept for the telescope dates back to the early 1990s, but delays, financial concerns, and diplomatic jockeying have dogged the project.

What Is Square Kilometre Array?

When it is finished in 2028, the Square Kilometre Array (SKA) will be the biggest radio telescope ever built. The institution will address the most pressing issues in astrophysics and is located in three parts: South Africa, Australia, and the United Kingdom.

COPYRIGHT_SZ: Published on https://stationzilla.com/square-kilometer-array/ by Alexander McCaslin on 2022-12-06T06:01:27.513Z

It can conduct the most accurate testing of Einstein's theory and look for aliens. In the far-flung Murchison shire of Western Australia and the Karoo of South Africa's Northern Cape, delegates from the eight nations leading the initiative are gathering for ceremonies.

If everything goes according to plan, the first phase of the Square Kilometre Array (SKA) will be a multi-purpose radio telescope operating in the frequency range of 50 MHz to 15 GHz, which will play a significant role in addressing fundamental issues in contemporary astrophysics and cosmology.

The SKA's capabilities will enable for revolutionary experiments to be undertaken in a broad range of research domains, and its survey speed will be one hundred times that of present radio telescopes. After the party is done, the bulldozers will start clearing up the area.

This is the moment it becomes real. The first 10 years were about developing the concepts and ideas. The second 10 was spent doing the technology development. And then the last decade was about detailed design, securing the sites, getting governments to agree to set up a treaty organisation (SKAO) and provide the funds to star.

- Prof Phil Diamond, Square Kilometre Array Organisation

Astronomy | Construction of the next phase of the Square Kilometre Array (SKA) starts today

How Does The Telescope Work?

About 131,000 Christmas tree-like dipole antennas will be part of the telescope's original design alongside about 200 parabolic antennas.

It is intended that tens of thousands of square meters of land be used to create an efficient collection area. By doing so, the SKA will be able to study astronomical objects with unprecedented sensitivity and resolution.

The system's operating frequency range will be somewhere around 50 MHz all the way up to 25 GHz. In terms of wavelength, this is on the order of centimeters to meters.

This might make it possible for the telescope to pick up on very weak radio signals from cosmic sources billions of light-years from Earth, such as those released in the first few hundred million years after the Big Bang.

Hydrogen is the most common element in the universe, therefore understanding its whole history will be one of the SKA's primary goals. Hydrogen should be seen by the telescope even before the first stars formed when massive clouds of the element imploded.

The SKA is going to contribute to so many areas of astronomy. One would be these 'fast radio bursts' that have been detected. These things output the equivalent of an entire year's worth of energy from our Sun in just a fraction of a second. And we have no idea what they are. How is that possible? Hopefully the SKA will have an answer.

- Dr Shari Breen, Square Kilometre Array Organisation

SKA In Future

Contracts for various purchases will be revealed during related events. Out of a projected total building cost of €2 billion, they will add up to a little about €500m (£430m).

The first important step forward will be taken in 2024 when a network of four Australian dishes and six South African antenna stations will be configured to function as a basic telescope. Once this milestone is reached, the array's complete deployment will begin.

The SKA's effective collection area will be below half a million square meters by the year 2028. The current design allows for expansion indefinitely, potentially to the greatly sought-after area of one square kilometer. It's possible if additional nations join the organization and pay their fair share in funding.

Currently, the organization counts South Africa, Australia, the United Kingdom, China, Italy, the Netherlands, Portugal, and Switzerland among its members. The pact has been approved by the aforementioned nations.

The European Union now includes France, Spain, and most recently Germany on the way to membership. Countries such as Canada, India, Sweden, South Korea, and Japan have all shown interest in joining at some time in the future.

Final Words

More than 131,000 tree-shaped antennae, each roughly 6.5 feet in height will easily detect low-frequency radio waves between 50 and 350 megahertz.

Researchers claim that the SKA-Low will be eight times more sensitive than existing telescopes, with a resolution that is twenty-five percent greater, and the ability to sweep the sky one hundred and thirty-five times more quickly.

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About The Authors

Alexander McCaslin

Alexander McCaslin

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