Source: A fairly popular astronomy guy on TikTok/YT
In: Planetary Science
Light is emitted as little particles called photons. Those photons spread out as they travel. If you are far enough from a Light source, the photons will be so spread out that they will miss you entirely.
We can see Andromeda from the Milky Way. So it makes sense that you’d be able to see both galaxies if you were between them in deep space. But there probably are regions between galaxies or galaxy clusters that are so distant and the photons are so spread out that you will not see them at all.
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