How many days are there in a year on the planets?

Answer 1

* A year (orbit) of a planet can be defined in terms of Earth days, or solar days on the planet itself. For the equivalent of a year in Earth days, see the explanation to the right.

* Years in terms of experienced solar days on each of the 8 major planets:

Mercury - 0.5 days per year (solar day 176 Earth days, year 88 days)

Venus - 1.92 days per year (solar day 116.75 Earth days, year 224.7 days)

Earth - 365.25 days per year

Mars - 668.6 days per year (solar day 29.66 Earth hours, year 687 days)

Jupiter - 10875.8 days per year (solar day 9.9 Earth hours, year 4332.6 days)

Saturn - 24401 days per year (solar day 10.57 Earth hours, year 10759 days)

Uranus - 42718 days per year (solar day 17.24 Earth hours, year 30799 days)

Neptune - 89666 days per year (solar day 16.1 Earth hours, year 60190 days)
There are eight planets in the Solar System and the dwarf planet Pluto. The length of year for each is depicted below in Earth-days:

• Mercury - 88 Earth Days
• Venus - 224.7 Earth Days
• Earth - 365.25 Earth Days
• Mar - 687 Earth Days
• Jupiter - 11.9 Earth Years (4,346.475 Earth Days)
• Saturn - 29.7 Earth Years (10,847.925 Earth Days)
• Uranus - 84.3 Earth Years (30,790.575 Earth Days)
• Neptune - 164.8 Earth Years (60,193.2 Earth Days)
• DP Pluto - 248 Earth years (90,582 Earth Days)