Our experience of "daylight" is caused by the atmosphere. Without our atmosphere the sky would be entirely dark all of the time, except for the exact spot where the sun is. Our atmosphere scatters light in all directions and this is what creates "daylight". The atmostphere creates the "blue" appearance of the sky. In space there is no atmosphere, so light does not scatter. Consequently only objects that receive direct sunlight will be illuminated and everything else will be darkness. --- Extra ---