A fun question that most don’t even think about: If every point in the entire sky contains, at some distance, a star who’s light energy is reaching earth, why is the sky not lit up like daylight even at night? There is an answer, but most people don’t even ask the question.
That question was answered by Edgar Allen Poe, who was not only a great story teller, but also an amateur astronomer.
The stars are so far away, that their light has not gotten here yet..............
When I went to college For physics I got this question from my college professor...
I believe that empty space is not so empty. I suspect there are many clumps of matter that never formed stars, that may even have planets.
Especially with supernovas sending out chunks of matter all over the place formed of heavy elements .
Olber’s Paradox, the Big Bang, and the expanding universe.
Because there are not that many stars as we think?
You go big and it is mostly space.
You go little and it is mostly space.
No matter which way you go matter is scarce.
Life is even more scarce.
And sentient life is the rarest thing in the universe.
A little late, but here goes:
Inverse Square Law: The intensity of light is inversely proportional to the square of the distance.