NASA KSNN - Time Zones

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Hi I'm Jared, with more KSNN math news you can use.
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Did you know the Earth has 24 different time zones?
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I know the Earth's day is 24 hours long. Is that why we have 24 zones of time?
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Yes. The Earth is a sphere. It is divided into 360 degrees with longitude lines.
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I remember those lines are drawn north to south.
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The Earth turns 360 degrees in 24 hours.
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If you divide 360 degrees by 24 hours it means the Earth turns 15 degrees in one hour.
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So time zones are 15 degrees wide.
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And that's why we have 24 time zones.
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A long time ago cities set their time by the sun's location at noon.
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Two cities, a few degrees apart would still have a different time.
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Today these cities are in the same time zone.
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To learn more visit our website.
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Until next time, I'm Jared with cool math news you can use.

Title:: NASA KSNN - Time Zones
Description:: NASA Kids Science News segment explaining time zones and how they work.

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Video Language:: English
Duration:: 0:59

allaynew added a translation

English subtitles