Could you pass Astronomy 101? Take the quiz!

How much do you know about astronauts, meteorites, planets, stars, and galaxies?

5. What causes the seasons?

Photo Illustration/NASA
(Read caption)

Earth gets closer to the sun in summer than winter


The sun gets closer to the Earth in the summer


The tilt of Earth's axis


Earth is closer to the hot side of the sun in summer, and the cool side in winter

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