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Definitely, a 500-mm (20-inch) telescope is a large instrument because

500 mm is the diameter of the main mirror or lens, so the telescope would be

3-5 metres long. A telescope this size could see faint stars down to a

magnitude of round about 15.

Remember that you don't need any telescope at all to see stars. On a clear night

in a dark place, you can see a few thousand of them with only your eyes.

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11y ago

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