Earphone definition, a sound receiver that fits in or over the ear, as of a radio or telephone. See more.
Answer Wiki. If a rocket went straight up, it would either continue in that direction and leave Earth, or it would fall back down, depending on its velocity. Most rockets intend to enter orbit, which is an elliptical trajectory, and it's much more efficient to arc into this trajectory than to go straight up and then accelerate laterally.
When we look up in the sky during different times of the day, we see that the sun is moving from one direction to the other.It rises in the East in the morning and sets in the west.In reality,the sun is not moving,it is our earth that is rotating around the sun, this rotation causes day and night as explained above.