does the universe has a centre where the galaxies  orbit around it ?
138404
Often when people are told that galaxies are receding from us, they assume that means we are at the center of the Universe.  However, remember that the Universe is homogeneous and isotropic.  No matter where one is, it looks the same in all directions.  Thus, all galaxies\nsee all other galaxies receding from them.  Hubble's relationship is compatible with a Copernican view of the Universe: Our position is not a special one.\n\nSo where is the center?  *There isn't one*.  Although apparently nonsensical, consider the same question about the *surface* of a sphere (note the *surface*).  Where's the center of a sphere's surface?  Of course, there isn't one.  One cannot point to any point on a sphere's surface and say that, here is the center.  Similarly, because the Universe is homogeneous and isotropic, all we can say is\nthat, in the past, galaxies were closer together.  We cannot say that galaxies started expanding from any particular point.
240428
yes it goes around the sun.\n\nBut the sun orbit in the universe means that we orbit alot more suns although it would take billions billion years to do so.
138345
Just about all astronomers agree that at the center of our Milky Way Galaxy (and probably at the center of most other galaxies) lies a supermassive black hole. It probably has a mass at least 2-million times that of our Sun, and is approximately 96-million miles in diameter.\n\nThese figures come from careful observation and measurment of the motions of other objects near the galactic center.\n\nThis page has more info, plus a photo ---\nhttp://antwrp.gsfc.nasa.gov/apod/ap021018.html
1090455
They start out as an enormous gas cloud. Gravity causes the parcicles in the cloud to spin around the point of center mass, and the velocity of the spin subsequently flattens it into a disk. That's how galaxies, and on a much smaller scale, planetary systems form.
862094
The space between the galaxies is what is expanding.  Imagine raisin bread being baked.  As the bread rises, each raisin moves away from every other raisin.  Another way to visualize this is by drawing dots on a balloon then blowing the balloon up.  As the balloon get's bigger, each dot moves further away from every other dot.  It's the same for galaxies.\n\nNow the expansion of the universe is only detectable at extremely large distances.  Nearby galaxies like M31 can move towards us.  But most galaxies we see are extremely far away, so almost all of them are receding from us.
67361
At least 100 billion galaxies are known to exist in the Universe. Our galaxy is a spiral one, so in terms of structure it consists of galactic core and several spiral arms. In terms of composition it includes stars, planets (made from regular matter, including atoms of all naturally occurring elements and ions), galactic gas and dust (made from regular matter, mostly hydrogen and helium as far as the gas goes, and hydrogen, carbon, silicon, oxygen and some other elements as far as the dust goes), dark matter and dark energy (there is little known about the last two).
1022362
Off course scienists investigate this. Our galaxy is pretty flat around where we are - only 3,000 light years wide. It gets thicker then that in the center -16,000 light years but that's still pretty thin compare to it's length - about 100,000 light years across. "above" and "below" us are other stars, possibly with other planets. Basically the same things that are "in front" and "behind" us across the length of the galactic disk. \nOn a very dark night you'll be able to see a bright band across the night sky - that's the Milky Way. You'll then be looking towards the galactic center. The pictures we recive from satelites and telescope come from different directions.\nAs for a 3D model of the universe there is such a project in progress but it deals with objects on a much larger scale - galaxy clusters, superclusters, walls and fillaments.
777198
the Milky Way is a galaxy
429063
The Milky Way is moving at about 1,342,161 mph towards a galactic cluster known as Abell 3627\nhttp://answerway.com/expertans.php?category=243&expertname=Locii&catnam=Physics\n\nOur galaxy is NOT moving towards the center (or centre) of the universe. The universe has no center!\nhttp://sciastro.astronomy.net/sci.astro.9.FAQ\n\nGod should be spelled B-I-G B-A-N-G\nPBrax@netscape.com
531320
They really don't. Galaxies come in all sorts of shapes and sizes, spiral, elliptical, round, etc. Few are rotating though, and some in different directions. All seem to be moving away from each other, though, as most scientists agree that the Universe is still expanding,thus blowing a few holes in the old "big bang" theories.
44714
Universe is ONE and it is ever expanding.\n\nThere are many solar systems like ours in our Galaxy. There are billions of galaxies in the universe.\n\nIf you are interested to know more, check the site http://www.space.com site.
111814
The galaxy is help up by angular momentum. The star are all rotating around the center of the galaxy, although the details are different from a simple solar system, and the resulting orbits can be a tad odd.\n\nThe real question is what hold the galaxy together - and that is gravity. Gravity from all the stars, dust, and the massive black home in the center of most galaxies (including ours) and a large gravitational contribution from "missing matter."
462919
In a geocentric system, the Earth is at the center of the universe, and everything else goes around the Earth.  It was believed that the Earth was at the center up until the 1500s, when Gallileo and Copernicus used much more accurate measurements of planetary movements to prove it wrong.  Gallileo was even condemned and tortured by the Church for saying that the Sun was at the center of the solar system.
22208
The Milky Way is the galaxy we live in. Our Solar System is inside some constelation within the galaxy. A Galaxy has millions of stars and Solar Systems.\n\nThe sun is far from being the origin of the Big Bang. It's just a REALLY REALLY small part of it.\n\nOh, Milky Way is also a chocolate bar.
717111
No.\n\nGalaxies are groups of stars and planetary systems.\n\nA single sun (even ours) is not powerful enough to have a galaxy rotate around it (gravitationally speaking).\n\nDoesn't work that way.  We move around inside the galaxy, not the galaxy around us.
998170
Our solar system is tucked into a corner of the galaxy where the stars are scattered far from each other.\n\nThe stars are denser closer to its centre.
768523
It's due to a process of vortical adduction dynamics.  Galaxies are not centrifugal (spinning outwardly), they spin inwardly.  Hence, this is why the centers of galaxies are utterly ancient, because stellar material is gravitated from the outer terminus to the core of the galactic system.  Consequently, the youngest matter is at the outer extremity and the older matter is in the center, i.e. Black Holes.  Conventional astronomy categorizes the various galaxy "types" as independent forms, but the reality is all galaxies “evolve” through a maturation process beginning with; \n1) the young dust filled Irregular Galaxies; \n2) that eventually evolve into Barred Galaxies;\n3) which transform into Spiral Galaxies; \n4) then the spiral arms contract inward creating Bulging Galaxies (the Sombrero Galaxy is a good example); \n5) next they condense into Elliptical Galaxies;\n6) and then ultimately they become deadly Seyfert Galaxies.\n\nIt’s complex to explain, but vortical adduction dynamics is generated by an oscillating concentric reticulation field across the vast fabric of the Known Universe.  The galaxies form through an autocatalytic process on the high crests of this vast web-like structure, and travel along these arteries.  Many other components come into play and are required, i.e. temperature and the essential horizontal plane of the universe.  The best way to understand this is to rapidly tap the side of a clear plastic water cooler and note the pattern produced on the surface sheet of the water.  The concentric waves will collide and intermingle until a continual resonance establishes the vibratory reticulation field.  It will look somewhat like a concentric spider web separated by four-sided valley-like cupularies.  The galaxies do not enter these low zones, but are confined to the crests surrounding these zones.