J Jeffrey Guest Jan 19, 2009 #1 the universe is 13.5 billion years old, and is running out of light... how many more billions of years before the universe is completely pitch black?
the universe is 13.5 billion years old, and is running out of light... how many more billions of years before the universe is completely pitch black?
E eelfins Guest Jan 19, 2009 #2 Never. However far space expands, the photons don't just go away; they will get farther spread out, but never disappear.
Never. However far space expands, the photons don't just go away; they will get farther spread out, but never disappear.
S shortestgiraffe Guest Jan 19, 2009 #5 it doesn't really matter. when there is no light, there is no sun. with no sun we will instantly freeze and die. i wouldn't worry about needing a flashligh.
it doesn't really matter. when there is no light, there is no sun. with no sun we will instantly freeze and die. i wouldn't worry about needing a flashligh.
