Earth
The Sun's position in our solar system.
What is the center?
This dictates the seasons on Earth, rather than the closeness to the Sun.
What is if the Earth is tilted towards or away from the Sun?
From a Spanish word for moon, this term refers to the moon.
What is "lunar"?
This is when the length of the day and night is equal all over the world.
What is an equinox?
The moon affects these, changing on our beaches.
What is the "ocean tides"?