> never really understood how just adding extra invisible stuff to make the equations work is justified IANAP but here’s my understanding. At the end of the m

> never really understood how just adding extra invisible stuff to make the equations work is justified IANAP but here’s my understanding. At the end of the month you spent $2000, you’re not sure how so you track down your expenses: - rent $500 - groceries $120 - gas $80 - … - unknown: $123 That ‘unknown’ is dark matter. It’s a placeholder. It’s there and makes your total but you can’t explain it yet.