Step 1: A lunar eclipse is the darkening of the Moon when it passes through the Earth's shadow. Step 2: For this, the three bodies must be in a straight line in the order Sun – Earth – Moon, so the Earth is in the middle. Step 3: This can happen only on a full-moon night. Step 4: When the Moon comes between the Sun and the Earth (new moon), it causes a solar eclipse instead. Answer: The Earth comes between the Sun and the Moon.