euesa1-6, Exercise 1: Telescopes in space

Model answer:

Advantages (any two): the atmosphere does not blur the image, so the view is sharper; some kinds of light (X-rays, much of the infrared) hardly reach the ground, and a space telescope can observe them; and a telescope in orbit can observe continuously without the problems of weather and daylight.

Disadvantage: it must be launched, is costly, and cannot easily be repaired, so it has to work reliably on its own.