Think first, then research, then THINK again. Think for the pleasure of thinking.
Yesterday’s ‘Think’: “Light by which we see the planets” — We see the planets (in our solar system), comets (and for that matter asteroids and other minor planets, albeit not naked eye) thanks to the reflected light from our Sun. None of the planets, comets or for that matter any of the other bodies in our Solar System generate any light bright enough to be seen from Earth, naked eye. Any light that they produce would be due to volcanic activity (or equivalent), burning gases and lightning storms. None of that produces enough light to be seen by us. So, everything we see in the Solar System is due to reflected sunlight. That is worth reflecting on.