If there were a Big Bang and we came from a single point then why do galaxies move in different directions and not at an outward expansion that points to that single reference point? Some galaxies move side ways like throwing a frisbee face on and some galaxies move like a frisbee but all are moving in a random direction and not from a single point.
For a few reasons.
1) Matter was not dispersed and expelled in perfectly parallel lines pointing outward from the central location of the big bang. Just like any other explosion you have seen on TV, the cloud it creates is not a perfect sphere of expanding material. Some material goes shooting out faster in one direction some slower in other directions. There also might have been numerous explosions that followed the big bang as the matter was still quite hot and unstable, creating further complexities.
2) As the matter from the big bang was not spread out uniformly, clumps of higher density came together to form galaxies and stars, etc. Just like our solar system has a motion around the center of our galaxy along one of the arms, galaxies are moving in their own groups (clusters), as well as super clusters that are gravitationally bound as well.
Since we are still moving away from the point where the big bang occurred, all galaxies are also moving away from us (and each other). Though, this does not give us a calculable center point of where the big bang occurred.
February 18th, 2010 at 5:59 pm
The further we look the faster the galaxies are ALL moving away from us. Only the LOCAL galaxy groups are gravitationally attracted and revolving around their center of MASS.
NASA has a good web site that explains the scientific data that supports the Big Bang Theory– here
http://map.gsfc.nasa.gov/universe/
References :
February 18th, 2010 at 6:32 pm
lets say that there is a big pile of frisbee’s in the park and it explodes.
the frisbies are not all going to fly away from the explosion at the same angle. They’re going to fly away at different angles. Its the same with galaxies. We’re all moving away from the "central" point of the big bang, we’re all just moving at different angles.
References :
February 18th, 2010 at 7:22 pm
For a few reasons.
1) Matter was not dispersed and expelled in perfectly parallel lines pointing outward from the central location of the big bang. Just like any other explosion you have seen on TV, the cloud it creates is not a perfect sphere of expanding material. Some material goes shooting out faster in one direction some slower in other directions. There also might have been numerous explosions that followed the big bang as the matter was still quite hot and unstable, creating further complexities.
2) As the matter from the big bang was not spread out uniformly, clumps of higher density came together to form galaxies and stars, etc. Just like our solar system has a motion around the center of our galaxy along one of the arms, galaxies are moving in their own groups (clusters), as well as super clusters that are gravitationally bound as well.
Since we are still moving away from the point where the big bang occurred, all galaxies are also moving away from us (and each other). Though, this does not give us a calculable center point of where the big bang occurred.
References :