Brown dwarf spectrum with T_eff = 600 K and a THEM’s spectrum with T_m = 200 K, T_h = 1000 K, and R_m = R_Earth at 3 pc. The two red rectangles show the wavelength ranges of MIRI filters F770W and F1800W. The black and orange points correspond to the integrated flux coming from a moon when the volcano is in and out of our line of sight, respectively. The difference between the two configurations is larger in filter F770W, as is shown by the orange and black points.