Anew object, object x, was discovered outside our solar system. object x is small and rocky, is not a satellite of any other object, and it has enough gravity to clear away smaller objects near its orbit. the characteristics of object x most closely resemble those of
comets
meteors
dwarf planets
planets

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?