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Planets orbit the Sun while moons orbit around planets. The amount of time required for a planet or moon to complete one orbit around another body is called an orbital period. On Earth, we call this orbital period a year. Our year is 365.256 days. On Mars it takes 686.98 days (Earth days, that is) to complete one orbit about the Sun--that's a long time to wait between birthdays!
24 hours (approximately). The solar day is exactly 24 hours, but it actually takes about 23 hours and 56 minutes for the Earth to rotate once. The extra four minutes are nâ¦eeded to allow for the change in position of the Sun in the sky due to the Earth orbiting the Sun.