Why is the night sky dark if the universe is filled with stars?
This is the essence of Olbersโ paradox. If the universe were infinite, eternal, static, and uniformly filled with stars, every direction we looked should eventually end at a star, making the entire sky as bright as a stellar surface.
But the universe has a finite age, and it is expanding.
Light from extremely distant stars and galaxies has not had enough time to reach us. And as the universe expands, that ancient light is redshifted to longer wavelengths, often far beyond what human eyes can see.
So the darkness of the night sky isnโt simply empty space.
It is a reminder that we are seeing a universe with a finite history, and that much of its light is still traveling toward us. ๐
@earthcurated Insectisides, pesticides , fertilizers killing all living creatures.. for 2% human consumption gmo crops.. making the rich richer killing nature..
Even in speculative futures full of synthetic entertainment, the human body moving in time and the human voice carrying emotion retain a distinctive charge. Simulations can approximate them, but the real thing imperfect, physical, present continues to matter for the same reasons.