Why is it difficult to observe at infrared wavelengths? what do astronomers do to address this difficulty?

The energy released by a nuclear fusion reaction is produced when

Newtons view of arrangement of the universe. don't copy from anywhere.

The largest observatory complex in the world is on mauna kea, the tallest mountain on earth. what are some factors astronomers consider when selecting an observatory site? don’t forget practical ones. should astronomers, for example, consider building an observatory on denali (mount mckinley) or mount everest?