Awareness and ignorance

its surprising the amount of things we knowingly ignore
when we start thinking about it, we become aware of it, otherwise those things exist without our awareness, quite a mind striking thought,
as the dark matter and energy ,and unknown existing stuff affects the events around us everyday.

What is ignorance?, intentional, unintentional,.. what is knowing : information in brain. Ignorance could be automatic or consciously driven, … for the benefit of fast approximate calculations.