How planets move in orbits?
Planets move in orbits that are called ellipses, which are like
slightly squashed circles. They started moving in this way even
before they were planets. When the Solar System was first forming,
there was just a big disk of gas and dust called the Solar Nebula.
The main part in the middle became the Sun, and eventually the dust
and gas collapsed under gravity to form the planets, in the same
direction the disk was spinning (counterclockwise).
If you want a more scientific answer, the planets are actually
falling around the Sun at a rate that allows them to travel in
these ellipses, which are basically just paths of curved
space-time, according to Einstein.