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Astronomy

Days, Years and the Seasons

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The rotation of the Earth

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How long is one day?

24 hours

How long is one year?

365¼ days

The Earth spins on its axis, which is tilted at an angle of 23.5°, and also orbits the Sun.

This causes day and night and the seasons.

Day and night

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It take the Earth 24 hours to complete one rotation about its axis.

Day and night

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The seasons

summer in the US

winter in the US

autumn in the US

spring in the US

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What is the season?