Neptune is the last
because during its orbit pluto's orbit around the sun intercepts neptune which makes neptune either second to last or last
Planet Neptune
All planets are in their orbits
Comets don't orbit a planet, they orbit the sun.
A large orbit.
No, Venus does not orbit a planet. It orbits a star, which is our Sun. It can not orbit a planet , if it did it would be a moon
Uranus is the planet that last 84 Earth years to complete one orbit around the Sun.
Planets orbit stars, not other planets. A planet-like object that orbits a planet is a moon.
The plane with the smallest orbit is Mercury, and the planet with the largest orbit is Neptune.
Gravity and Enertia (Not that sure on the spelling of the last one)
Never. That's a fictitious planet that never really existed.
Neptune or maybe Pluto, although it's considered a dwarf so not an official planet anymore.