there is the jungle planet were you beat the phinex there is the fire planet were you defeat the metal dragon there is the ice planet were you defeat the cougar coppter and there is a fourth planet on an asteroid were you face the boss aka Mordred
with the exception of Pluto Classed as "Dwarf Planet" the inner 4 planets Mercury, Venus , Earth and Mars are all solid planets (rocky) The planets after that are all Gaseous planets
You can find the names of some 260 different stars with planets circling them here: http://exoplanet.eu/
its not different at all they are just outer planets
Tales of Three Planets was created in 1964.
No, usually the planets are in different directions. Every few years two or three of them line up.
Tales of Three Planets has 283 pages.
Different planets have different orbit lengths because of their distance from the sun. Planets closer to the sun have shorter orbits, and planets farther away have longer orbits.
Mars Venus and Saturn
Because different planets have different masses :)
In fact, Venus, Uranus, and the "dwarf planet" Pluto orbit the Sun in the same direction as all the other planets. So all the planets orbit in the same way.However they rotate in the opposite direction to the other planets.
terrestrial planets
Different planets have different strengths of gravity.