International Astronomical Union The International Astronomers Union is currently in the process of defining planets in such a manner as to make future determinations of bodies orbiting the sun simpler.
see also Synodic Cycles,
Pluto remains a planet, and has two moons in addition to Charon.
There may be a total of 12 planets if the current working definition is adopted. From closest to the Sun to furthest:
Mercury – Venus – Earth – Mars – Ceres (previously planet, then asteroid, now???)
Jupiter – Saturn – Uranus – Neptune – Pluto – Charon – “Xena” 2003 UB313