Is all of our universe… lit? Can you be hurtling through space and accidentally fly head first into a planet because oops you didn’t have your headlights on?
In: Physics
All of the universe is lit by starlight to some degree (at least in open space). The degree of light may vary wildly depending on where you are, from right next to a star to an intergalactic void, but it’s all illuminated.
As to whether you could run into an object without seeing it first, that would depend on how sensitive your observations are, how reflective the object is (it’s albedo), and how well lit the area of space you’re in is. A reflective object near a star (such as our moon) will be hard to miss, but a non reflective object in intergalactic space will be much harder to see.
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