How can astronomers locate objects in the sky? by using distance and compass directions by using latitude and longitude by using altitude and zenith by using the celestial sphere and constellations

The point where two air masses meet is called a

Describe the most likely weather conditions at indiana / ohio boarder

Read the article titled "trans-saharan migration routes to north africa and the eu: historical roots and current trends." why do tens of thousands of sub-saharan africans try to cross the mediterranean each year? how are these refugees commonly portrayed? (site 1)