Quiz · Telescopes on Mountaintops

Question 1Why do astronomers prefer to build telescopes on high mountains?

The land there is cheaper to buy It is easier to bring equipment up The air is thin, dry and very clear The mountains are close to big cities

Question 2How wide are some of the largest telescope mirrors in the world?

Eight metres across Two metres across Eighty metres across Half a metre across

Question 3What removes almost all the blur caused by the moving atmosphere?

A special glass cover over the mirror Computers adjusting the mirror shape very fast Taking pictures only on cold winter nights Moving the telescope higher every few years