The answer to this question depends on how one defines the “edge of the solar system.” Since this term lends itself to a few defintions, I’ll offer a multi-faceted answer. If one defines Neptune’s orbit (~30 AU) as being the solar system’s edge, the Sun’s apparent magnitude would be approximately -19.3, which is 912 times … Continue reading How does the Sun’s apparent magnitude change as you move from Earth to the edge of the solar system?