Collimation aligns a telescope's parts for the sharpest images. Most telescopes need collimation at some point; reflectors need it often. Tools like laser collimators or Chashires help align the ...

When artists want an image to scream “telescope,” all they need to do is draw a sleek tube, put it atop a tripod, and point it at the heavens. Refractors embody the idea of the telescope. And for ...