ASTRONOMY 10. Which type of telescope is known to be difficult to keep aligned?
rotating
refracting
reflecting
radio

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.

the answer is yes, they are born/created, then they grow to their limit then produce offspring, then die.