Where are we? How far do the stars go? And are we alone? Infinity I, Amazon 2021
If our universe is truly infinite, then it is thought that anything that could happen, has happened an infinite number of times. ibid.
But we may also exist in an infinite universe, which is one of many infinite universes. ibid.
‘The biggest problem I have wrapping my head around.’ ibid. student
It appears as if the universe is continuing to expand at an ever-increasing rate. ibid.
Can we rule out some edge or boundary? ibid.
What if our universe is in an endless rebirthing process? ibid.
If an edge or boundary to the universe exists, then nothing has to exist. Although saying nothing exists suggests there is something there in the first place. Nothing is an equally hard concept for humans to understand. ibid.
‘I found nothingness more uncomfortable than infinity.’ ibid. astrophysicist
‘There is a seething froth of virtual particles coming into and out of existence that’s irreducible.’ ibid.
How can we be sure infinity truly exists within a black hole? ibid.
‘There is something that is making the universe accelerate. ibid.
Playing games with infinities is as mind-blowing as any game we could conceive of. ibid.
The multi-world theory is understandably a controversial one. ibid.
Is it possible that other dimensions exist of which we are blissfully unaware? ibid.
How can we learn more about these other possible dimensions? ibid.
Is this fune-tuning a pure random coincidence, or is this the common outcome in the universe? ibid.
Multiverses could explain a lot of unanswered questions about our universe. ibid.
How do we try and understand what may simply be beyond human comprehension? Infinity II
It has been approximated that there are more stars in our visible universe than individual grains of sand on every beach and desert of the world. ibid.
How big is our universe? Do we truly understand its scale? ibid.
If we are part of a large universe, what form could that take? And does that mean that in turn, we are a host to perhaps billions of much smaller universes? ibid.
So is it possible that there is a smallest building block of the universe, a particle that makes up everything. ibid.
‘There may be a fundamental limit to how small we can go, or how small a time that we could possibly experience or measure. It just seems continuous from our very big perspective.’ ibid. comment
Einsten’s theory as to the composition of the universe is what he termed space-time foam, which is at the quantum level. The theory predicts a foam-like structure which is the fundamental stuff of the universe. ibid.
Edwin Hubble observationally established the reality of an expanding universe. Cool Worlds: How Big is the Universe? Youtube 2021
How big is the universe. It’s the kind of question a child would ask. ibid.
GN-z11 is estimated to be 32 billion light years away from Earth … The space between us has been expanding ever since. ibid.
The horizon of the observable universe has a special name — the particle horizon. ibid.
Wrapped around itself … the universe might be smaller than we initially thought. ibid.
Diameter: 90 billion light years at a minimum. ibid.
A flat universe doesn’t have to be infinite. ibid.
What if the universe is infinite? … Everything that can happen, must happen. ibid.
It would mean there is an infinite number of yous out there. ibid.