How was the existence of cosmic dust proved? - Quora
astronomy - What really are some distant astronomical bodies that seems like dust clouds? - Physics Stack Exchange
How many galaxies does light from the Big Bang have to travel through before reaching Earth? - Quora
Why can't we see any stars around the center of our Milky Way Galaxy (from Earth)? What is there instead of just blackness? - Quora
What is the definition of blue stragglers in a Galaxy? - Quora
If same process occurs in formation of every star then why are they different from each other? - Quora
How dense is the dust in a galaxies dust lane? - Quora
What is a ring nebula? - Quora
Where do the dust clouds that form stars come from? - Quora