Moon–Earth mid-infrared emission light curves for one planetary orbit. 45°N (top row), Equator (second row), 45°S latitudes (bottom row), in columns the signals received by the observer's placed in opposition, western quadrature, conjunction, and eastern quadrature at the initial time. The colors correspond to the Earth (black) and Earth–Moon system, with lowest (red) and highest (blue) inclination angles of the Moon's orbit according to the observer's geometry (the possible orbits are comprehended between the two).