Hello guys! Why must an observer concentrate on one particular volume of space for a finite amount of time, rather than receiving the information/light instantaneously from it? E.G The Hubble UDF image? Why was the light not immediately received similar to when I look in my binoculars at the moon? Is this fundamentally due to the C+ universe expansion velocity? Can someone please explain to me the principals of the observation of light over extremely long distances? How much radiant energy from the sun is lost on its journey to earth? What mechanism is responsible? When sunlight on the way to earth interacts with interstellar matter what type of energy transfer is this? Assuming a radiant/thermal energy transfer (which I have no idea if this occurs)How can light be of infinite range, given conservational laws?