Recently, I learned that apparently both radiance and luminance are independent of the distance between the light emitting object and the observer.
The reasoning was that although the radiant/lumninant intensity decreases proportionally to the square of the distance (inverse square law), the solid angle subtended by the light emitting object as seen from the observer decreases by the same factor, thus, both factors cancel each other out so that radiance/luminance are always equal irrespective of distance.
There was, then, the example that if I have two equally light street posters with one being farther away from the other they would still look equally bright since the eye apparently measures luminance.
This made wonder: If radiance/luminance does not depend on distance to the observer, why aren't star in the night blindingly bright? There are many stars far brighter than our sun, shouldn't looking at those stars in the night sky be like looking into a laser?
Another logical consequence would also be that we should see stars brighter than our sun when at daytime since those stars would outshine our sun.