The universe's resolution limit—why we may never have a perfect view of distant galaxies
Can you make out the dot at the bottom of this question mark? What if you stand a few metres away? The finest detail the average human eye can distinguish is about the size of a full stop seen at a distance of a metre. This is called "resolution". The best resolution for an optical system – like the eye – is roughly given by the ratio of the wavelength...
I regard the brain as a computer which will stop working when its component fail. There is no heaven or afterlife for broken-down computers. That is a fairy story for people afraid of the dark