Astronomers use coordinate systems to plot the position of stars in the night sky

Looking up into the night sky you probably wonder how ancient star gazers were able to navigate using the stars in the night sky as their guide. One of the first things ancient star gazers did to help them navigate the night sky, and the surface of the Earth, was to create a coordinate system to pinpoint relative positions of the stars in the night sky in relation to one another.

Looking upward into the night ...