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A telescope does two things; it produces a magnified (enlarged) image of what it is pointing at, and it collects more light than the "naked eye". This means that we can see things more clearly and we can see things that are further away. When Galileo turned his telescope towards Jupiter in early 1609, he was able to see it bigger and brighter than with the naked eye. He could also see Jupiter's four largest moons, which cannot be seen with the naked eye at all. Nowadays we also attach cameras to telescopes, and take long exposures of objects in the night sky. All the while that the camera is making its exposure, the telescope is gathering light. An exposure of, say, 4 minutes, will gather twice as much light as a 2 minute exposure. With long exposures, astronomers are able to obtain images of incredibly faint and distant objects.

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Type your answer here... telescopes answered by Jacob welborn