‘Round ‘Round They Go Fusion Digital Lesson Unit 4 Lesson 2 Set up Paper for Cornell Notes Define gravity. Describe the relationships between Earth, the Moon, and the Sun Explain why observers see only one side of the moon Define Lunar phases. Describe the lunar cycle, and relate the cycle to relative positions of the sun, the moon, and Earth. Describe lunar eclipses. Describe solar eclipses. Why doesn't Earth's shadow interfere with the lunar phases? Name the four main lunar phases, in their correct sequence.