Conversation so far:
earth is what number planet from the sun
Earth is the third planet from the Sun.
what is the fourth planet from the sun
Mars is the fourth planet from the sun.
does mars have moons
Mars has two moons, Phobos and Deimos, which are small and irregularly shaped.
why are mars's moons small and irregularly shaped
Mars's moons may be captured asteroids.

Question: what are the seasons like
Self-contained rewrite: what are the seasons like on mars