Our universe has many cycles. Our galaxy, the Milky Way, turns like a wheel, and all the stars within it revolve around its center. Our solar system moves within this galaxy. The sun spins on its axis once every 24 days and 16 hours. The planets turn on their axis and orbit the sun.
Moons orbit their planets.
It took a long time for humans to understand about our planet and its cycles. Humans used to think that the earth was a huge plate that rested on the back of four elephants standing on a giant floating turtle. Or they believed that one of the gods carried the earth on this shoulders. We now know that the cycles of our planet earth, our moon, and the sun all affect life on earth. Sample some of the following activities to learn more about planetary cycles.