What are the eight primary phases of the Moon in order, starting from New Moon?
What causes the seasons on Earth?
What is a solar eclipse?
What is a lunar eclipse?
What star is currently closest to the north celestial pole and serves as the North Star?
How did ancient sailors use the stars for navigation?
Hint: Celestial navigation was essential before GPS.
What is retrograde motion of a planet?
What is the ecliptic?
What is the difference between a sidereal day and a solar day?
During which phase can a solar eclipse occur?