Wouldn't the Big Bang exert equal force in all directions and propelled the galaxies and all matters in a spherical pattern? Any enlightment would be greatly appreciated. Physicists, please?
2006-07-30 18:55:24 · 5 answers · asked by doctoreeeeeeevil 1 in Science & Mathematics ➔ Astronomy & Space
Hi doctoreeeeee...
The illustration you've seen as an embedded diagram, or a diagram with a dimension suppressed. Recall that space-time is a 4-D geometry: one time dimension and three dimensions. However we can only represent three dimensions in most drawings (without looking too complex). When the expansion of the universe is respresented like a funnel, what they're trying to show you is one time dimension (the longitudinal axis or height of the funnel) and two space dimensions (the width and breadth of the mouth of the funnel). The other space dimension is suppressed (ignored).
In this way the graphic shows you how the universe has expanded. Any horizontal slice across the funnel will show you the circumference of the (observable) universe at that point. As you move up the funnel, each successive horizontal slice produces a bigger circle than the previous one, showing you the expansion. If you like, replace any horizontal slice you make with a sphere (with the slice as its equator) and you've regained your 3rd space dimension again.
Note that importantly this is an illustration of the expansion of the size of the observable universe only. The actual universe didn't expand outward from a single point, it expanded from everywhere all at once (this is kinda hard to grasp, and people will talk of expanding balloon surfaces and raisin cakes to try to illustrate how something can expand without a centre of expansion). There's also no force associated with expansion, no momentum, etc. The notion of a conventional explosion and its associated physics doesn't help you here (it will distract you in fact). What happens is that the coordinate system increases in space and time, but there's no local motion for any object. If you'd like to know more about this please ask further questions.
Hope this helps!
The Chicken
2006-07-30 19:11:46 · answer #1 · answered by Magic Chicken 3 · 1⤊ 0⤋
It's artistic license used to show an expanding Universe as a drawing. It has nothing to do with the actual event.
2006-07-30 19:19:41 · answer #2 · answered by ozzie35au 3 · 0⤊ 0⤋
Because the expansion of the universe is thought to be accelerating. There are many theories about this, including dark matter and dark energy
2006-07-30 19:01:11 · answer #3 · answered by Danushka B 2 · 0⤊ 0⤋
Actually that representation you are talking about represents The double blast cone not the Blast sphere which are only representations of what might have happenned following the blasts of things that we can observe blowing up here on earth.
2006-07-30 19:00:01 · answer #4 · answered by ? 3 · 0⤊ 0⤋
It's actually shaped like the symbol for infinity. Sorta like this ><, like if you put two 2-liter bottles together. That's my theory anyway.
2006-07-30 19:00:00 · answer #5 · answered by askme 4 · 0⤊ 0⤋