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View submission: Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
For your first question: NASA has a "Pluto Time" page[1] which will tell you when the sunlight at your location (typically just after sunset) will match the intensity of the midday Sun on Pluto.
1: https://solarsystem.nasa.gov/planets/dwarf-planets/pluto/plutotime/
For your second: nebulae appear dense because they are large, not because they are far away. If you were located inside one, you wouldn't be able to tell from your immediate surroundings, but distant objects like other stars would be blocked out, just like we cannot see the stars "behind" nebulae as viewed from Earth.
There's nothing here!