- #1
artis
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- 976
Space evidently is expanding, so we say that the very fabric of space time is expanding uniformly in all directions, so two questions
1)originally this expansion was driven by the energy content within the universe aka the dense hot matter , versus nowdays the acceleration is picking up speed and since visible and known matter doesn't account for that alone we plug in the terms dark matter and dark energy to our cosmological model as a explanation (although the wording dark indicates an unknown subject)
2) this was bit tricky for me so I decided to ask, if space is expanding the matter within the space should also expand should it not? Like for example everything from the very tiny such as subatomic level to the very large like galaxies and planets and stars should also increase in their size by some portion since space is expanding uniformly everywhere similarly right? Now do we not see this expansion in matter but see it through light/EM radiation simply because for systems such as galaxies and planets and stars and even atoms the other forces like gravity and electrostatic repulsion/attraction, EM fields etc are much more stronger than any effect from the expansion so these forces cancel out any potential effects?thank you.
1)originally this expansion was driven by the energy content within the universe aka the dense hot matter , versus nowdays the acceleration is picking up speed and since visible and known matter doesn't account for that alone we plug in the terms dark matter and dark energy to our cosmological model as a explanation (although the wording dark indicates an unknown subject)
2) this was bit tricky for me so I decided to ask, if space is expanding the matter within the space should also expand should it not? Like for example everything from the very tiny such as subatomic level to the very large like galaxies and planets and stars should also increase in their size by some portion since space is expanding uniformly everywhere similarly right? Now do we not see this expansion in matter but see it through light/EM radiation simply because for systems such as galaxies and planets and stars and even atoms the other forces like gravity and electrostatic repulsion/attraction, EM fields etc are much more stronger than any effect from the expansion so these forces cancel out any potential effects?thank you.