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.
FACT: No telescope makes PLANETS, NEBULAE or GALAXIES appear any brighter than they can be seen with the naked eye. Most people are very suprised by this statement, and many assert that it cannot possibly be true. The reason why is a bit difficult to explain, but bear with me, and I shall try.