Which telescope has a higher resolution - radio or optical? Detailed answer

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Which telescope has a higher resolution - radio or optical? Detailed answer

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Which telescope has a higher resolution - radio or optical?

The shortcoming of radio telescopes for a long time was their low resolution, reaching even for large radio telescopes only a few minutes of arc.

The problem was solved by using the technique of interferometry, when the signals falling on different radio telescopes are collected and processed on a computer. In this case, two or more radio telescopes behave as a single instrument with a diameter equal to the distance between the individual radio telescopes.

Using simultaneously three radio telescopes installed in the USA, Australia and South Africa, astronomers were able to see the structure of the pulsar, located at a distance of 1600 light-years from Earth in the constellation of Sail. A cloud of hot gas emitting radio waves has a diameter of 500 kilometers, and in its center is a neutron star with a diameter of about 10 kilometers.

If an optical telescope had such resolution, it could see a large virus on the surface of the Moon from the Earth.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

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The artist Vladislav Koval sent letters to his relatives while studying in Moscow. At the same time, he did not stick stamps on envelopes, but drew them, and all letters came in this form. When the Ministry of Press announced a competition for sketches of new stamps, student Koval brought a pack of envelopes to the organizers and became the winner.

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