Also, I am loving his system of physical taxonomy:
Physics below our feet is Chthonic and above our heads is Meteoric.
Of meteoric phenomena, most are some kind of glowers.
Of glowers, there are our two, favorite glowers, to which we assign personal names (the Sun and the Moon ... or Helios and Selēnē) proper glowers (stars), wandering glowers (planets), feathered glowers (comets), falling glowers (meteors), and glowers-through-holes (lightning flashes).
Epicurus also emphatically states that the kósmos includes "the remaining glowers" not mentioned above, which should have included other objects visible to the naked eye, such as the asteroid Vesta. Since the Andromeda and Triangulum galaxies are (barely) visible with the naked eye, and since they would have been much more obvious 2,300 years ago, I wonder if it would therefore be appropriate to consider that the ancient Epicurean kósmos properly includes the entire Observable Universe?
Maybe I'll save that for another thread...