Question

The Earth revolves around the Sun and it takes

• A. 365.25 days to complete one revolution
• B. 365.5 days to complete one revolution
• C. 366 days to complete one revolution
• D. 365 days to complete one revolution

Hint:

Earth's true revolution period is 365.25 days. The extra 0.25 day accumulates over four years to form a single full leap day added to February.

Answer 1

The Correct Option is A

Concept: The astronomical orbital period of the Earth around the Sun defines a solar year. While a standard calendar year is counted as a whole number of days, the physical orbital completion takes slightly longer.

Step 1: The precise time taken for the Earth to execute one full scientific revolution around the Sun is approximately 365 days, 5 hours, 48 minutes, and 46 seconds. This is mathematically represented in fractional days as roughly 365.25 days (or more accurately, 365.2422 days).

Step 2: To compensate for this extra fraction of approximately 0.25 days (\(\frac{1}{4}\) of a day) each year, an additional day is inserted into our calendar tracking system every four years. This creates a Leap Year consisting of 366 days, which keeps our human calendars aligned with the astronomical seasons. Hence, Option (A) is the correct choice.