Respuesta :

brodielynchhammers

Explanation:

Larger lenses are heavier, and tend to sag under their own weight, ruining the image quality as the lenses distort. The long mounting tubes are hard to make mechanically stiff, and so they tend to flex under the weight of the lens, making it hard to keep the optics in alignment.

aachen

The different types of telescopes include refracting telescopes, reflecting telescopes, radio telescopes, and rotating telescopes.

  • The refracting telescope was used by Galileo to discover the mountains and valleys on the moon.
  • These refracting telescopes required long lenses in order for the light to focus properly.
  • However, these long lenses made the telescope heavy.
  • Because of their heaviness, it becomes difficult to keep refracting telescopes aligned.

Hence, the correct answer is refracting telescopes.

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