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The universe: Planck 2013<br />
Planck 2013 XVI (Table 2 ff): Term “dark matter” due<br />
to Oort (1933)<br />
The sum of all Ωs very close to unity, critical density:<br />
“flat” geometry, like a perfect tabletop:<br />
ΩΛ = 0.692 ± 0.010<br />
Ωdm = 0.2582 ± 0.0047<br />
Ωb = 0.0482 ± 0.00076<br />
Ωk = 1 − ΩΛ − Ωdm − Ωb = −0.0005 ± 0.0066<br />
H0 = 67.8 ± 0.77 km/s/Mpc<br />
Assuming gradual re-ionization<br />
zre−ion,init > ∼ 20<br />
Thomson depth: τT = 0.092 ± 0.013<br />
The age of the universe:<br />
t0 = (13.798 ± 0.037) · 109 yr<br />
6<br />
80 years: what is dark matter?
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