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Densities
Densities in kg/m3 (data is from Wikipedia; E means x 10^["n"th power])
 
1.0E−27 The universe
1.0E−22 Space in galactic arm (.0625 hydrogen atoms/cc)
1.0E−18 Space in galactic core (600 hydrogen atoms/cc); Best laboratory vacuum (1 pPa)[1]
2.0E−14 Sun's corona[2]
1.0E−13 Top of solar transition region[2]
1.0E−11 Bottom of solar transition region[2]
5.00E−6 Lower chromosphere ----------------------------------- 5 mg/cc
1.34E−5 Earth atmosphere at 82 km altitude; star Mu Cephei
1.09E−4 Earth atmosphere at 68 km altitude
2.00E−4 Solar photosphere–chromosphere boundary[2] 200 mg/cc
4.00E−4 Solar photosphere's lower boundary[2] --------- 400 mg/cc
1.00E−3 Sun just below its photosphere[2]; Vacuum from a mechanical vacuum pump
1.80E−2 Earth atmosphere at 30 km altitude[3]
9.00E−2 Hydrogen gas, the least dense substance at STP
1.60E−1 Earth atmosphere at 16 km altitude[3]
0.9 Ultralight metallic microlattice[4]
1.1 Lowest-density aerogel[5]
1.48 Earth atmosphere at sea level
10 Average low-density aerogel[5]
65 Atmosphere of Venus at surface[6]
500 Highest-density aerogel[5]
534 Lithium near room temperature
1,000 Water at 4 °C
1,062 Average human body[7]
1,408 Average of the Sun
5,515 Average of the Earth
10,490 Silver (Ag)
11,340 Lead (Pb)
13,534 Mercury (Hg)
19,100 Uranium (U)
19,250 Tungsten (W)
19,300 Gold (Au)
21,450 Platinum (Pt)
22,560 Iridium (Ir)
22,590 Osmium (Os), the densest known substance at STP
4.1E4 Hassium (Hs), estimated density, assuming that an isotope featuring a long half-life exists
6.4E4 Average density of KOI-55b, the densest known exoplanet
1.5E5 Sun's Core
1.0E9 White dwarf
2.0E13 Universe at end of the electroweak epoch
2.0E17 Atomic nuclei and neutron stars
1.0E23 Preon star
5.1E96 Planck density
Black hole at singularity


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