Question about Galileo Optics

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When I look at he stars through the telescope it looks no "bigger" than looking at the stars with the naked eye.

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That's absolutely correct. Stars are so incredibly distant that they are effectively point light sources. Except for the largest telescopes ever built and those orbiting in space there are no telescopes which make stars seem bigger. But they will resolve what appears to be a single star into binaries, for example. Larger telescopes also gather far more light than the human eye, so will show objects which are far too faint to be seen with the naked eye.

Higher magnification eyepieces are mostly used for lunar and planetary observation, but the more magnified the image, the less bright it is. High magnifications also show up any optical flaws in the objective lens and atmospheric interference, so it's always best to use the lowest magnification which allows you to see the detail you're after.

Posted on Oct 03, 2010


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