alpha2cen Posted December 12, 2010 Share Posted December 12, 2010 (edited) I'm wondering about this. There is a gravity in the Universe. And there are many black holes . At the beginning of the Universe galaxies are very close. But there is not super massive galaxy . Why this phenomena happen? Any good opinion? Edited December 12, 2010 by alpha2cen Link to comment Share on other sites More sharing options...
Spyman Posted December 13, 2010 Share Posted December 13, 2010 (edited) What is a "super massive galaxy"? The Universe is filled with galaxies of different sizes and mass, were do we draw the limit between normal and super massive? Very close to the beginning of the Universe there was no galaxies, stars and galaxies are thought to have formed roughly several hundred million years after the Big Bang. Gravity has over time organized Stars in Galaxies and Galaxies themselves in Clusters which are organized in Superclusters. If galaxies are forming in random sizes, then some will be smaller and some larger, but there will be a spread depending on the initial distribution of matter limiting the maximum size, so one could answere that the initial conditions didn't allow for any 'super galaxies'. Since galaxies merge and cannibalise on each other, adding others stars and mass to their own, the average size and mass they have today is also the result of this process and as such the question could also be answered with that they have not yet have had enough time to grow. However we have observed gigantic objects in the Universe: IC 1101 is a supergiant lenticular galaxy at the center of the Abell 2029 galaxy cluster. It is 1.07 billion light years away in the constellation of Serpens and is classified as a cD class of galaxy. Size The galaxy has a diameter of approximately 6 million light years, which makes it currently (as of 2010) the largest known galaxy in terms of breadth. It is thought to contain up to 100 trillion stars, compared to our own galaxy's estimated 0.25 trillion stars, or Andromeda's 1 trillion. Being more than 50 times the size of the Milky Way and 2000 times as massive, if it was in place of our galaxy, it would swallow up the Large Magellanic Cloud, Small Magellanic Cloud, Andromeda Galaxy, and Triangulum Galaxy. IC 1101 owes its size to many collisions of much smaller galaxies about the size of the Milky Way and Andromeda galaxies. http://en.wikipedia.org/wiki/IC_1101 The Great Attractor is a gravity anomaly in intergalactic space within the range of the Centaurus Supercluster that reveals the existence of a localised concentration of mass equivalent to tens of thousands of Milky Ways, observable by its effect on the motion of galaxies and their associated clusters over a region hundreds of millions of light years across. http://en.wikipedia.org/wiki/Great_Attractor The Sloan Great Wall is a giant wall of galaxies (a galactic filament) and, as of 2010, is the largest known structure in the Universe. Its discovery was announced on October 20, 2003 by J. Richard Gott III of Princeton University and Mario Jurić and their colleagues, based on data from the Sloan Digital Sky Survey. The wall measures 1.37 billion light years (1.30×1025 m) in length and is located approximately one billion light-years from Earth. http://en.wikipedia.org/wiki/Sloan_Great_Wall Edited December 13, 2010 by Spyman Link to comment Share on other sites More sharing options...
alpha2cen Posted December 14, 2010 Author Share Posted December 14, 2010 The Sloan Great Wall is a giant wall of galaxies (a galactic filament) and, as of 2010, is the largest known structure in the Universe. Thank you for good answering. But its not all sufficient for explaining gravity role in the Universe. Sloan Great Wall is not one galaxy. Why galaxy does not become huge amount of size beyond our imagination!!! According to our thought, Gravity is an attraction force, it can pull everything nearby without any trouble. There may be something we don't know. Link to comment Share on other sites More sharing options...
Sisyphus Posted December 14, 2010 Share Posted December 14, 2010 Thank you for good answering. But its not all sufficient for explaining gravity role in the Universe. Sloan Great Wall is not one galaxy. Why galaxy does not become huge amount of size beyond our imagination!!! According to our thought, Gravity is an attraction force, it can pull everything nearby without any trouble. There may be something we don't know. Our galaxy is huge beyond my imagination. Link to comment Share on other sites More sharing options...
mytechuniverse Posted December 14, 2010 Share Posted December 14, 2010 (edited) My best guess would be that the constant yet somewhat difficult to explain expansion of the universe overcomes the gravitational pull between galaxies. This would be probable because of the vast distance already between galaxies. This prevents the galaxies from moving closely together and combining. Also, many galaxies contain black holes at the center. There is most likely a point at which the black holes has a negligible gravitational effect on the edges of the galaxy. However, I don't claim to be an expert. Edited December 14, 2010 by mytechuniverse Link to comment Share on other sites More sharing options...
Spyman Posted December 14, 2010 Share Posted December 14, 2010 (edited) My best guess would be that the constant yet somewhat difficult to explain expansion of the universe overcomes the gravitational pull between galaxies. This would be probable because of the vast distance already between galaxies. This prevents the galaxies from moving closely together and combining. Also, many galaxies contain black holes at the center. There is most likely a point at which the black holes has a negligible gravitational effect on the edges of the galaxy. However, I don't claim to be an expert. Currently Andromeda and Milky Way are closing in on each other and will eventually merge, inside clusters of galaxies the gravity are stronger than the expansion and keeps the objects inside bound together. The Black Holes in the center of galaxies could be said to anchor them but when compared to our solar system were the Sun is dominant and holds ~99.8% of all mass in the system, the supermassive Black Holes in the centers of galaxies are small compared to the total mass of it's host galaxy, I think much below 0.1%, so they are not the dominant force holding stuff at the edges of a galaxy. Dark matter that likely are evently distributed in the galaxy accounts for around 90% of the mass are the dominant force for the overall structure and holds the galaxy together. Thank you for good answering. But its not all sufficient for explaining gravity role in the Universe. Sloan Great Wall is not one galaxy. Why galaxy does not become huge amount of size beyond our imagination!!! According to our thought, Gravity is an attraction force, it can pull everything nearby without any trouble. There may be something we don't know. The Sun consists of most of the mass in our system and yet it is incapable of 'pulling' in the planets because the planets have speed which combined with gravity is causing them to orbit, similar to how our system ended up swirling around the Sun in the center, in large systems like clusters of galaxies, individual galaxies had initial speed relative each other causing them to orbit around their center of mass. Edited December 14, 2010 by Spyman Link to comment Share on other sites More sharing options...
Just the Facts Posted January 4, 2011 Share Posted January 4, 2011 It appears that the universe is infinite. All the matter within the universe is gathered into galaxies caused by electric currents causing magnetic fields. The matter lines up in positive and negative sides and form the galaxies as we can see them. The Magnetic Push-Pull effect makes them start to rotate. The electric energy is concentrated in the center as we can clearly see. There are NO black holes. The gravity theories are erroneous at best. The new plasma/electric/magnetic conclusions are far more probable and make much better sense. Here is the future of cosmology. Link deleted Link to comment Share on other sites More sharing options...
swansont Posted January 4, 2011 Share Posted January 4, 2011 It appears that the universe is infinite. All the matter within the universe is gathered into galaxies caused by electric currents causing magnetic fields. The matter lines up in positive and negative sides and form the galaxies as we can see them. The Magnetic Push-Pull effect makes them start to rotate. The electric energy is concentrated in the center as we can clearly see. There are NO black holes. The gravity theories are erroneous at best. The new plasma/electric/magnetic conclusions are far more probable and make much better sense. Here is the future of cosmology. Link deleted ! Moderator Note JtF, please take a moment to review the rules you agreed to abide to when you opened your account. Pay especially close attention to Rules 2.5 and 2.10 Link to comment Share on other sites More sharing options...
steevey Posted January 7, 2011 Share Posted January 7, 2011 (edited) I'm wondering about this. There is a gravity in the Universe. And there are many black holes . At the beginning of the Universe galaxies are very close. But there is not super massive galaxy . Why this phenomena happen? Any good opinion? Well early on a lot of matter got used up for a bunch of systems smaller than "super-massive galaxies", and as the universe progressed and age, these developing galaxies began to move farther and farther apart, so it become harder and harder for matter to gather in a small region of space. Galaxies can collide, but in the process, much matter is thrown outward and away from the galaxies. This is only if your talking about a singular galaxy however. In the universe, there are "Galactic Super-clusters" which are sections of the universe categorized by the large number of galaxies within them. In fact, we're in the Virgo super-cluster right now. Edited January 7, 2011 by steevey Link to comment Share on other sites More sharing options...
Moontanman Posted January 7, 2011 Share Posted January 7, 2011 Define what you mean by super massive galaxy. How big is super massive? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now