What is the primary reason space appears inky black when viewed from orbit?

Answer

There are virtually no particles in the vacuum to intercept and redirect sunlight toward the observer

In the vacuum of space, there is no medium present to scatter the sunlight. Light travels in straight lines, so if an observer looks away from a direct light source (like the Sun or Earth), there is no light reaching them from that direction, resulting in absolute blackness.

What is the primary reason space appears inky black when viewed from orbit?
Spaceskyastronautsvacuumlight scattering