There is no friction in space to stop them so they keep on spinning under what is called conservation of angular momentum.
Neptune and Pluto
A rotating object.
No, other planets are rotating at other speeds.
a sphere
The planets orbit AROUND the sun, so technically not back and forth.
it reproduces energy for people to use by continuously rotating
The Earth, and all rotating planets, rotates on its axis.
yes it has about 360000 thousand rings rotating around it
They were formed by a nebula that was rotating in that direction.
rotation-planets on axis revolution-planets in orbit
Planetesimal hypothesis is the theory of the formation of the planets. It is believed that cosmic dust particles continuously stick together resulting in the formation of the planets.
Because the Earth is rotating :D