As the title says, if there’s infinite stars, wouldn’t the light from all of them have reached us and made our night sky become completely white from the number of stars there are? Is there just not enough stars in proximity to earth for all the light to reach us in time to see?
I’m sure there’s a simple answer, but it’s 1am here and my brain can’t figure it out.
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It all has to do with the speed limit of the speed of light. Light is made up of small particles called photons. These only travel 1 light year (6 trillion miles/9.7 trillion kilometers) in 1 year. Stars that are 4 light years away take 4 years for the light to reach us. Stars that are 4 billion light years take 4 billion years to reach us. So not all of the stars there are have light that has reached us.
It also has to do with perspective. If you’re trying to see a dozen people and want to see all the people you would spread them out. But what about a million people? You wouldn’t be able to spread them out enough to see all of them, some would be hidden behind other people. Just like stars. And all of this happens while the people are constantly moving and so is the observer too.
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