# What planet has longer days and years and is rocky?

Mars has a longer year than Earth (about twice as long) and its day is 24 hours and 38 minutes long.

### Why do planets have days and years of different legths?

A day is when a planet makes one full rotation on its axis. A year is when a planet makes one full circuit around the sun. The reason that each planet has a day and a year of different lengths are because each planet moves at a different speed. The planets which rotate slower on their axes have longer days, and the planets which move slower around the sun and are further away from the…

### What is a year on the planets?

The revolution times (Years) of the planets, in Earth days, is:- Mercury is 88 days Venus is 224.7 days Earth is 365.24 days Mars is 686.961 days Jupiter is 4,331.572 days or 11.86 years Saturn is 10,832.327 days or 29.46 years Uranus is 30,799.095 days or 84.323 years Neptune is 60,190 days or 164.79 years *Pluto is 248 days. *Pluto is no longer a planet but a dwarf planet See related question for rotational times…

### The planets revolve around the sun once during each what?

The planets revolve around the sun each year. The year for each planet is different because it either takes the planet longer or shorter to get around the sun than other planets. The year of each panet is mesured by how many Earth days or years it takes to get around the sun. Length of Planetary Year in Earth Days/Years: Mercury: 88 days Venus: 225 days Earth: 365.25 days Mars: 687 days or 1.88 years…