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Is space made of 'stuff'?
is this 'stuff' a fractal?
A balloon in vacuum doesn't need energy to expand either, provided it's a bubble-gum balloon.
Is space made of 'stuff'...
.. and is this a fractal given that space is expanding.
In order to expand ,does space need energy and if so where does this come from.
Could space be a 'field' and if so would it have a related particle?
[Does] space need energy to expand?
Yes, it needs energy
No, space does not need energy in order to expand, conservation of energy applies. A balloon in vacuum doesn't need energy to expand either, provided it's a bubble-gum balloon.
There is an hypothesis that the total energy of the universe is zero.
In the balloon analogy, the pressurized gas is the energy source which drives the stretching of the bubble-gum balloon. So it takes energy to stretch the balloon, but it comes from a different form of energy, leaving the total energy of the system unchanged.
So this adds three questions to the original question:
What does NB stand for?