Does the Universe have a centre or an edge?
The centre of expansion, the centre of our observable region and cosmic horizons are different concepts. Why a limit on observations is not a wall around the Universe.
Tag archive
#cosmic expansion
Articles: 3
What is dark energy?
How supernovae and cosmic scales reveal accelerated expansion, what negative pressure means, and what the new DESI results have not yet proved.
How do we know the Universe is expanding?
Spectral lines, independent distances and supernova light-curve durations: how observations test cosmic expansion, and why individual galaxies can approach us.