Approximately how many days does it take Earth to orbit the Sun?

Approximately how many days does it take Earth to orbit the Sun?

• A. 200 days
• B. 500 days
• C. 730 days
• D. 365 days

Answer: (D)

Earth completes one full trip around the Sun in about one year. That time is roughly 365 days. The reason it’s about 365 is that one orbit isn’t exactly a perfect number of days, so our calendar uses 365 days most years and adds an extra day every four years (a leap year) to keep the calendar in sync with the Earth's orbit. So the number that fits this idea best is about 365 days—not 200, not 500, and not 730, which would be roughly two years.

Earth completes one full trip around the Sun in about one year. That time is roughly 365 days. The reason it’s about 365 is that one orbit isn’t exactly a perfect number of days, so our calendar uses 365 days most years and adds an extra day every four years (a leap year) to keep the calendar in sync with the Earth's orbit. So the number that fits this idea best is about 365 days—not 200, not 500, and not 730, which would be roughly two years.