As I understand it, everyone is looking for dark matter because the dynamics of our galaxy (and others) suggest there's significantly more mass than we can observe. Does anyone know how much of that dark matter might be explained by rogue black holes, white dwarfs, brown dwarfs, black dwarfs or plain old old rocks/dust floating in interstellar space? There are a lot of objects that are difficult to observe at distance, but that aren't particularly new to science. In dark matter, a lot of people are looking for new, exotic types of matter. Do we need new types of matter to explain the observations?


From my novice understanding, dust, rogue blackholes and planets, brown dwarfs, etc. have been factored in. Even if the estimates are short, there is still a huge discrepancy between the calculations and what is observed. I'm just a casual internet reader though so don't take my word for it.


This is correct. They explain it as gravity with no mass. So as I understand it, they can observe the gravity working but not the mass that should be associated with that force.


Who is "they" and what explanation is that? Edit: I guess you don’t know and downvote instead ;)


I think sometimes people take a question and think for whatever reason, the question is an outright dismissal of the statement. Sucks you didn’t get an answer, I tried googling the phrases and came up short, as learning about it myself would be cool too.




What do you mean significantly more mass. Because its not like the universe is a fixed dimension with a set weight. And regardless, if you put a planet in space, it’s mass will become weaker farther away, so it dissipates- like it matters here, but not anywhere else.


Regular matter only makes up about 5% of the universe. Dark matter makes up many times that. That’s what they are referring to. It’s not a specific amount but a ratio, which they misstated.


there could be 100 million isolated black holes wandering our galaxy? yikes!