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  1. Krusty

    China completes world's biggest telescope | ABC Online

    Radio telescopes aren't hard to build as compared to optical telescopes. Radio telescopes aren't any different from the satellite dish you have in your terrace to receive signals for your TV. Optical telescopes are a different story altogether. Grinding just one metre of mirror/Lens will take...
  2. Krusty

    China completes world's biggest telescope | ABC Online

    The title is misleading.. it should say worlds largest radio telescope. In comparison to this 500m aperture, the worlds largest optical (single) telescope has an aperture of just 11 meters. Radio telescopes are easier and far cheaper (per meter aperture) than optical telescopes.
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