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Home Q & A Board Science-Related Homework Help Physics
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staedtler staedtler
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7 years ago
Leap years, which contain one extra day, are needed in order to correct for the fact that

(a)   1 year is not exactly 365 days but about 365.25 days.
(b)   the Earth speeds up and slows down periodically in its orbit around the Sun.
(c)   the length of the day has changed since the calendar was devised by ancient Greeks, because of the effect of the tides in slowing down the spin of the Earth.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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papachulopapachulo
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staedtler Author
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7 years ago
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