The Expanding Universe Answers

The Sun appears to move in the sky because , which causes day and night.

Each year Earth . Its path, or , is shaped like an ellipse.

Each year Earth . Its path, or , is shaped like an ellipse.

tides occur when the Sun, the moon, and Earth are nearly aligned. tides happen when the Sun and the moon are at right angles to each other. Each of these special tides happens in a lunar cycle.