Zero.
Planets are nonliving and have never lived.
mars has been a planet for about 4.6 million years.
It's Jupiter that has the long lived storm, not Mars
No double nor no life on Mars, Because the only planet that can be lived is Earth.
Mars
If the planet was exactly in between Mars and Jupiter, it would take 3645.029 days.
If you lived on Mars, the planets that would exhibit retrograde loops when viewed from Mars would be Earth and Venus. This is because the retrograde motion of a planet is an optical illusion observed when Earth passes by another planet in its orbit, causing the other planet to appear to move backward in the sky relative to the background stars.
Mars is an inner planet.
Which planet?
687 days
Mars's Valles Marineris
Mars IS a rocky planet
Planet mars was named after the god of war mars.