1. When an electron drops from one orbit to a lower orbit, it secretes a photon. 2. Any body with a temperature above absolute zero secretes black body radiation. Black body radiation can't possibly be caused by electrons dropping orbits, because there are only so many electron orbits, and bodies can emit black body radiation for a really long time. There aren't enough orbits to sustain those durations. So where does this perpetual stream of photons come from? I get that the black body photons take thermal energy away from their source atom or molecule, so energy is still conserved. What I'm asking is, from hence exactly do black body photons issue? From the electrons? From the nucleus? From the atom as a holistic unit?