All the following statements are true.Which one explains why our calendar has leap years?
A)Earth's axis precesses with a period of about 26,000 years.
B)There is a difference between a sidereal year and a tropical year.
C)A tropical year is slightly more than 365 days.
D)Earth's speed varies as it orbits the Sun.

Question

Quizplus · Accepted Answer

A tropical year, which is the basis for our calendar year, is about 365.24 days long. To keep our calendar in alignment with Earth's orbit around the Sun, an extra day is added every four years, creating a leap year.

All the Following Statements Are True