"H'ElonEarth" is a Superman crossover story arc published by DC Comics. Written primarily by Scott Lobdell, it details the appearance of H'El, a mysterious Kryptonian.
Earth–Moon–Earth communication (EME), also known as Moon bounce, is a radio communications technique that relies on the propagation of radio waves from an Earth-based transmitter directed via reflection from the surface of the Moon back to an Earth-based receiver.