Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: JennyGracie on 28/02/2019 15:04:03

Title: What exactly is the universe expanding into?
Post by: JennyGracie on 28/02/2019 15:04:03

Rob wants to know,

What exactly is the universe expanding into, given dark matter and antimatter will only ever increase the expansion and there will be no contraction?

Does anyone know?

Title: Re: What exactly is the universe expanding into?
Post by: yor_on on 02/03/2019 02:07:43

Think of it as connections. Think of it as a 'defined mass of a universe'.
What 'expands' is not mass, it's 'space'.

Space is presumed to be 'null', expecting homogeneity and isotropy. It doesn't 'change' due to a accelerating expansion.
So what does it 'expand' into?

A geometry?

Title: Re: What exactly is the universe expanding into?
Post by: geordief on 02/03/2019 02:56:10

Into itself?