Multiple choice general knowledge science & technology

Our earth orbits around the sun. How long does one complete orbit of the earth around the sun take?

  1. Less than 365 1/4 days

  2. Exactly 365 1/4 days

  3. More than 365 1/4 days

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

One orbit around the sun (a tropical year) takes approximately 365.2422 days, which is slightly less than 365 1/4 (365.25) days. The difference is why our calendar skips leap years on century years not divisible by 400. The 365 1/4 approximation was used in the Julian calendar but was slightly too long.

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