Using the definition of revolution around the sun - then as old as the Earth, or about 4.5 billion years. It is essentially unchanged since then.
It's rotation around its axis (a day) started later (maybe a quarter of a billion years later) but is constantly slowing down.
Uranus
Mars - 24.6 hrs
The planet that has the shortest period of revolution is Mercury, which is 88 days. The planet with the longest revolution is Neptune, which is 165 years. Earth's revolution is the third shortest.
There is no planet with a revolution period of 164 Earth days. Neptune, however, has a revolution period of 164.8 Earth years.
The term rotation refers to the Earth turning on its axis once per day. The term revolution refers to the earth circling the sun once per year.
no they are not
Gyres
the period of revolution is related to the semimajor axis.... :)
the period of revolution is about 6.4 days
A year.
Days & Years.
24 i think.