<p>Bendiness = space-time curvature. </p>

<p>And yes, it is flat (k=0) for the EdS model. Essentially it is the epoch at which only matter is thought to dominate (no contributions from radiative pressure or dark energy, $\Lambda$).</p>

<p>It is only a model. The EdS universe is thought of as a static Universe which is expanding indefinitely. It just makes solving certain equations in Cosmology a little easier, but it was perhaps due to Einstein's stubbornness in accepting a dynamic Universe.</p>

CC BY-SA 3.0
2015-11-30T23:31:17.360Z
2015-12-01T09:34:14.433Z
2015-12-01T09:34:14.433Z
MichaelJRoberts
<p>I know an Einstein-De Sitter universe is a "flat" universe, i.e. with a K ("bendiness", sorry, don't really know what to call it in English) factor of 0, but does that entail anything as to its contents? The Wikipedia page is quite lackluster on this aspect, and my astronomy course textbook merely slightly less so (it says it's made up mainly of "non-relativistic, dust-like matter").</p>

CC BY-SA 3.0
2015-11-30T23:30:21.593Z
This may really help your understanding: [https://ned.ipac.caltech.edu/level5/Watson/Watson2_4_1.html].
MichaelJRoberts
<universe><matter>
What does an Einstein-De Sitter universe look like?
David Cian
# What does an Einstein-De Sitter universe look like?

(Asked by: username_0 on 2015-11-30)

I know an Einstein-De Sitter universe is a "flat" universe, i.e. with a K ("bendiness", sorry, don't really know what to call it in English) factor of 0, but does that entail anything as to its contents? The Wikipedia page is quite lackluster on this aspect, and my astronomy course textbook merely slightly less so (it says it's made up mainly of "non-relativistic, dust-like matter").

**Tags:** universe, matter
> **Comments:**
> **username_1**: This may really help your understanding: [https://ned.ipac.caltech.edu/level5/Watson/Watson2_4_1.html].  

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## 1 answers

### Answer by username_1 on 2015-11-30. Score: 1 | Accepted answer

Bendiness = space-time curvature.

And yes, it is flat (k=0) for the EdS model. Essentially it is the epoch at which only matter is thought to dominate (no contributions from radiative pressure or dark energy, $\Lambda$).

It is only a model. The EdS universe is thought of as a static Universe which is expanding indefinitely. It just makes solving certain equations in Cosmology a little easier, but it was perhaps due to Einstein's stubbornness in accepting a dynamic Universe.


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