3 ms·

Oh, a fair[0] amount[1] 0 - https://en.m.wikipedia.org/wiki/List_of_largest_optical_reflecting_telescopes https://en.m.wikipedia.org/wiki/List_of_largest_optic

• defrost 3y ago
  That's, ahhh, kind of obvious and missing the point about the wavelengths more commonly used in modern astrophysics. A better rejoiner would've have pointed out the optics-like bending and focusing of all wavelengths about gravitational wells, eg: https://news.stanford.edu/press-releases/2022/05/02/gravity-telescope-image-exoplanets https://news.stanford.edu/press-releases/2022/05/02/gravity-... works for more than just the visible wavelengths.
  • marcus0x62 3y ago
    If that was the point you were trying to make, it might have been better to state it rather than link to two articles about radio astronomy and ask “what does optics have to do with telescopes” Reflective and refractive optical telescopes are still important (and still being built.)