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Hobby Killers: What Telescopes Not to Buy - Sky & Telescope - Sky & Telescope
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SOLVED: An astronomer wants t0 observe at a particular wavelength using one of the telescopes listed. Arrange these telescopes from worst to best angular resolution based on the diffraction limit. Worst resolution
Hobby Killers: What Telescopes Not to Buy - Sky & Telescope - Sky & Telescope
Telescopes for sale in Rock Island, Oklahoma | Facebook Marketplace | Facebook
The 6 signs of a bad telescope. | Spectrum Scientifics' Store Blog