The Five Planets
The ancients had beautifully dark skies, dusted with thousands of stars of varying brightness. At some point, they noticed that five of these stars were quite different from the rest. Not only were they conspicuously bright, but they also moved against the background of the sky, while all the rest were fixed in place. These movements weren’t all at the same speed, and varied over time, so these special stars became known as “Planets“, from the greek word for … Continue reading →