Which direction do we launch a satellite?

Carrying a satellite to the fixed position in space, a great amount of energy is needed. To get much energy, we launch the rocket toward the east, which is the same direction of the Earth’s rotation. By combining the energy of rocket flying to space with the energy of the Earth’s spinning, we can transport the satellite further.

Also, satellites have various purposes and there is a suitable orbit for each of them in order to achieve their own purposes. For example, in case of “polar orbit” spinning around the Earth’s North and South Poles to observe the whole earth, we launch the rocket toward the south.