I mean, on earth, I assume that as sun shine on the day time part of earth, light are dispersed by the sky making our day time sky blue? But how does light gets distributed outside of our atmosphere?
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Astronauts in the ISS experience 15 sunsets and sunrises every day because the ISS completes 1 full orbit of the Earth ever 90 minutes. That’s not really important though because they use the same 24 hour clock that we use.
>But how does light gets distributed outside of our atmosphere?
It doesn’t. That’s why space is black. You are correct in your assumption that the sky is blue because the atmosphere scatters blue light. The ISS is in space and (mostly) out of the atmosphere, so there’s nothing to scatter the light. That’s why photos of space are always black. Astronauts will always see space as black when they look out the window regardless of whether the sun is visible or not. [Here is a picture from the ISS during daytime](https://static.independent.co.uk/s3fs-public/thumbnails/image/2014/08/21/11/RTR2OVXV-v3.jpg?quality=75&width=990&auto=webp&crop=982:726,smart). You can see that the sun is visible and extremely bright and the Earth is well lit, but space is still black.
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