All Questions
Tagged with observable-universe cosmological-horizon
4
questions
3
votes
1
answer
260
views
Conditions in the Early Universe
I am interested in how the large-scale properties of the Universe change over time.
Does anyone know a trusted website which gives the temperature, density and radius (distance to the particle horizon)...
- 371
5
votes
2
answers
349
views
Size of the whole universe if it were spherical
Suppose the universe is spherical and its density ratio is
$\Omega \leq 1.00125$
$\Omega = 1.00125$ is approximately the maximum possible value of the density ratio according to the Planck Mission ...
- 2,264
2
votes
2
answers
202
views
How far away are objects whose light will never reach us, because of the expansion of the universe?
I thought I had read this question on Stack Exchange before, but now I cannot find it... In fact, I thought I had posted this question before, somewhere, on Stack Exchange...
I believe the answer ...
- 5,307
2
votes
1
answer
334
views
What exactly is wrong with this plaque in Neil deGrasse Tyson's "back yard"? Has it been fixed?
The Wikipedia subsection Observable Universe; Misconceptions on its size shows this image of a plaque, with the caption:
An example of the misconception that the radius of the observable universe ...
- 30.7k