Could "Black holes" account for the mass that seems to be lacking from our known Universe ("Black matter")?

Question

The total amount of mass that is observed in our Universe is much smaller than the total quantity of mass required to account for the total gravitational pull that is present. Therefore the existence of a mysterious unobservable kind of matter is postulated("Black matter"), Could it be that this "Black matter" is no more or less than all the matter that has been accumilated in the gravity traps called "Black holes"? Such matter is (almost) unobservable , but does still exert its gravitational pull. Of course this means that the quantity of matter present in Black holes must be vastly larger than assumed until now. But why not? Black holes being alone in empty space, with no more matter around them to suck in, would be practically unobservable. One can imagine that such "lone" Black holes could originate from the collapse into one point of complete Galaxies or even clusters of Galaxies.
Or alternatively:
Very large numbers of "small" Black holes that also are almost unobservable?

Answer 1

No. Black holes have definite gravitational properties which we would be able to observe, and they emit various kinds of radiation, which we would be able to detect. "Dark matter" is still undefined.

Answer 2

Cool!
Complex Observation With Chandra, Hubble, And Ground Telescopes Exposes Dark Matter
Frank Morring Jr./Aerospace Daily & Defense Report
08/22/2006 09:21:49 AM


A serendipitous collision between two galaxy clusters at an angle that presents its profile to Earth has given astronomers what they believe is the first clear evidence that dark matter - the most likely explanation for much of the extra gravity in the universe - actually exists.

By contrasting superheated gas radiating in the X-ray spectrum with the mass distributed across the so-called "Bullet Cluster," astronomers have been able to show that the gas - normal matter that can be "seen" by NASA's Chandra X-ray space telescope - isn't in the same place as the cluster's mass. Dark matter has been hypothesized as the invisible force that holds together galaxies, which would fly apart if they relied only on the gravity from their visible stars.

The Bullet Cluster - also designated 1E0657-56 - is actually two large galaxy clusters that collided about 100 million years ago. While the hot gas between the galaxies in the colliding clusters interacted, creating the bullet shape that gives the cluster its name and generating 100-million-degree temperatures, the dark matter kept on going.

The results are clearly visible in composite images containing more than 100 hours of Chandra data and gravitational lensing data collected by the Hubble Space Telescope and a pair of big ground-based telescopes, which pinpoint mass in the Bullet Cluster by measuring the effect it has on light from sources beyond the cluster that is literally bent by its gravity.

"In the Bullet Cluster, we've seen for the first time a large spatial separation in the sky between where the majority of the normal matter is found and where most of the gravity is found," said Douglas Clowe, a postdoctoral fellow at the University of Arizona, in a teleconference announcing the finding on Aug. 21. "This cannot be explained by altered gravity from normal matter, regardless of what one does to the gravity laws. This provides the first direct proof that dark matter does exist, and must make up the majority of the matter in the universe."

Clowe and his teammates, who are publishing their results in an upcoming issue of the Astrophysical Journal Letters, believe their observations refute an alternate theory that gravity does not behave everywhere in the universe as it does on Earth, and that different types of gravity elsewhere create the observed conditions. While there may be differences in the way gravity operates elsewhere in the universe, they say, their data clearly show that dark matter has enough mass to account for its observed gravitation effects on visible matter.

"The problem with the idea that gravity is modified is that there's a million different ways to modify gravity," said team member Sean Carroll, a physicist at the University of Chicago's Fermi Institute. "... You want to be able to take something like a cluster of galaxies, which in the conventional understanding has a lot of dark matter and ordinary matter, and remove from that cluster all of the ordinary matter, so there's nothing left there, essentially except the dark matter, and then ask yourself is the gravity still pointing toward that cluster. This is exactly what the universe has done for us in the Bullet Cluster."

Answer 3

Black holes and dark matter are two completely different things.

Black holes are singularities created by gravitational implosion of a star. When something is inside the event horizon of a singularity it has no effect whatsoever on the outside universe.

Dark matter and energy are hypothetical negative equivalents to ordinary matter and energy. They are believed to have an enormous influence on the universe, essentially applying an 'antigravitational' effect on ordinary matter.

So by definition the dark matter couldn't be inside black holes. You are confusing the two terms because they use similar metaphors.

Answer 4

No. Black holes don't account for more than a very tiny fraction of it.

Realising this is why the dark matter theory came about in the first place.

Black holes and 'dark matter' are very different things, but now they have found direct evidence of dark matter.

See these links:
http://physicsweb.org/articles/news/10/8/17/1
http://www.nationalacademies.org/headlines/20060830.html

Answer 5

It has not been proven to me that black holes exist. Merely guesses,by so called Geniuses,that have no idea about what Pluto is or is not,and it's in our own Solar system. How can they tell what is going on at the center of our own Milky Way galaxy,which is by the way 30,000 light years away from us. All they will ever do is guess,and most people will buy it. Most people know as much about the center of our Galaxy as Stephen Hawking.

Answer 6

Ms. Kato, i believe you nailed it precisely. Your clarification grew to become into suited. the only element i might upload is to describe the question approximately shrinking black holes. Stephen Hawking theorized that it grew to become into accessible for thermal radiation to be emitted from black holes using quantum outcomes. This radiation is termed Hawking radiation. Black holes might lose mass using this radiation, and given adequate time a black hollow will thoroughly evaporate using fact of it. of direction, this might purely ensue if not something grew to become into falling into the black hollow to fill up the lost mass. no person has considered a black hollow evaporate yet, so this thought continues to be unproven.

Answer 7

No. Dark matter is a finch factor they use to compensate for the errors created in the calculation of total matter in the universe

Answer 8

Dark matter may account for a large percent of the universal mass. Go read the following article for the latest info.
http://www.aviationnow.com/avnow/news/chanel_space_story_.jsp?id=news/CHAN008226.xml

Answer 9

They count black holes. It's called 'dark matter.' Have a nice day.