This depends on whether you count Pluto as a planet or not. If you don't, then Neptune has the longest orbit period (nearly 165 Earth years). If you do, then Pluto has a orbit period of 248.1 years.
If you count Pluto, you might also count Sedna which takes 12,050 years. Sedna is 2/3 the size of Pluto and it's 960 times as far from the Sun as the Earth.
http://wiki.answers.com/FAQ/3969
the first planet mercury
That's the normal configuration - for planets to travel around their central star. If the planet would NOT move, it would quickly fall into the central star.That's the normal configuration - for planets to travel around their central star. If the planet would NOT move, it would quickly fall into the central star.That's the normal configuration - for planets to travel around their central star. If the planet would NOT move, it would quickly fall into the central star.That's the normal configuration - for planets to travel around their central star. If the planet would NOT move, it would quickly fall into the central star.
That would be Saturn.
Jupiter: it's the largest.
For the same reason that it would take longer to run around your block than to run around your yard. The further planets have a further distance to travel to make one revolution around the sun.
about five times less than earth
You would be the youngest on Neptune (Pluto is no longer a planet) where 1 year = 164.79 years on Earth.
Days are longer than nights in the summer, and the reverse in the winter.
Neptune. (Pluto is no longer considered a planet, but, rather, a dwarf planet.)
Planet Thea is no longer a planet it is now the moon. it smashed into earth around 4 and a half million years ago but i would say ''Thea'' the moon is gray. hopefully that helps you. sorry but planet Thea is not a planet anymore.
It would take a space shuttle around 9 years to travel from Earth to the planet Uranus. The actual duration would vary based on the specific trajectory taken and the speed of the spacecraft.