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Are you a space whiz? Take our 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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