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.
Confidence votes 68. There are two things that cause the constellations to appear to move. The earth does not rotate once a year round the sun, its called orbiting, rotate is spinning and orbit is moving around an object.