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Thread: Newton's Third Law on the Big Bang, Time Dilation of Black Holes, Black Holes Themselves, and Dark Matter Formation

  1. #1 Newton's Third Law on the Big Bang, Time Dilation of Black Holes, Black Holes Themselves, and Dark Matter Formation 
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    A few questions I've been pondering over from my last post. I believe I've done my research this time

    Newton's Third Law on the Big Bang Theory
    How does Newton’s third law apply to the Big Bang? Many seem to bring up the "Big Crunch" Theory or other universe ending answers, but I am curious about the beginning of the Big Bang. The explosion that created our universe clearly is in the realm of a force. So what would be the opposite of an explosion so massive it created a universe? If one happened with full physics involved I’d think the back force itself would create a black hole. Could physics of not fully formed yet creating other possibilities like multiple explosions from being forced back into itself? Did the explosion have no core? As in it had no inward force during the explosion.

    Edit Note: I just had a very slow realization that without physics Newtons Law would not apply.

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    Time Dilation of Black Holes
    If time appears to stop for an object that is being observed entering a black hole, does that mean that the light we see from the center of galaxies are really millions of long dead “ghost” stars stopped timelessly before they entered the event horizon?
    If that is correct then why are not smaller black holes much more visible if it has a companion star? The collected gases from that star surrounding the event horizon, but never falling in (least to an observer) should be very bright. Am I wrong and the black holes are actually quite visible? When I tried searching out this answer myself I found the question was too specific and any photographs of black holes with companion stars seem to be just fabrications.

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    Black Holes
    Could black holes be a class of star? A massively dense star like some sort of super neutron star. It might have its own sub layers and fuse matter into denser matter, perhaps even dark matter? I do realize that dark matter is not baryonic matter. Which is obviously something you'd typically find in a star. However, since normal matter goes into a black hole and only radiation seems to come out could baryonic matter turn into a different matter? Since you can not create something denser than the force applied to the object one would think of this as a mathematically testable hypothesis. Mathematician I am not, but could you take a black holes mass and compare it to a theoretically similar size and mass of dark matter, then compare the forces produced to find any similarities?

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    Dark Matter Formation
    I do realize current theories claim it takes an insane (even by universe standards) amount of time for a black hole to evaporate, but since we've never witnessed such an event how sure are we that it is correct? I ask this because I was curious if dark matter didn't always exist. This could make the universe much older than previously thought. There could have been much MUCH more matter in the universe to start with, but overtime it turned into dark matter. Stars could form fairly early on in the universe, but galaxies could not. Why? It was not waiting solely on supermassive black holes, they are too weak to hold galaxies together. Perhaps not enough dark matter had been created to support galaxies. This could of taken billions of years just to pull the universe's visible matter out of its cloudy mess. Since we are blocked by the cloudy mess of gasses at the 14.5 billion year mark how could we know just how long that period lasted? Could matter have resisted the larger formations in the universe until dark matter took over around 14.5 billion years ago. Working off of this since 70% of the universe is dark matter will this continue to grow until there is too much? Is there a way to see if dark matter is increasing now?
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  2. #2  
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    Quick answer on big bang theory: Newton's third law is almost irrelevant to whether or not there is expansion but it plays a role in slowing down. The law is about forces, and thus about the deviation of objects from inertial motion. So we look for the equal and opposite reaction when there is a deviation from inertial motion. The expansion of the universe is essentially the free inertial motion of all ideal bodies everything already has a built in velocity. The presence of this matter, however, slows the motion of other matter, and so the expansion slows down over time as any particular ideal body attracts all other bodies to it and is attracted in turn to all other bodies.

    Things get slightly more complicated when we add a force that pushes things away, but it really remains the same, but in reverse. The question then becomes one of the balance between pulling force and pushing force. Newtonian theorists actually worked this out before GR.
    Alklazaris likes this.
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