Luzum, Brian; Capitaine, Nicole; Fienga, Agnès και άλλοι. (10 July 2011). «The IAU 2009 system of astronomical constants: the report of the IAU working group on numerical standards for Fundamental Astronomy». Celestial Mechanics and Dynamical Astronomy110 (4): 293–304. doi:10.1007/s10569-011-9352-4. Bibcode: 2011CeMDA.110..293L.
Luzum, Brian; Capitaine, Nicole; Fienga, Agnès και άλλοι. (10 July 2011). «The IAU 2009 system of astronomical constants: the report of the IAU working group on numerical standards for Fundamental Astronomy». Celestial Mechanics and Dynamical Astronomy110 (4): 293–304. doi:10.1007/s10569-011-9352-4. Bibcode: 2011CeMDA.110..293L.
Tkalčić, Hrvoje; Young, Mallory; Bodin, Thomas; Ngo, Silvie; Sambridge, Malcolm (12 May 2013). «The shuffling rotation of the Earth’s inner core revealed by earthquake doublets». Nature Geoscience6: 497–502. doi:10.1038/ngeo1813. Bibcode: 2013NatGe...6..497T.
See structure of the Earth:
inner core volume 0.7%, density 12,600–13,000, mass c. 1.6%;
outer core vol. 14.4%, density 9,900–12,200 mass c. 28.7–31.7%.
Hazlett, James S.; Monroe, Reed; Wicander, Richard (2006). Physical geology : exploring the earth (6. ed.). Belmont: Thomson. p. 346.
The hydrosphere (Earth's oceans) account for about 0.02% 2.3×10−4 of total mass, Carbon for about 0.03% of the crust, or 3×10−6 of total mass, Earth's atmosphere for about 8.6×10−7 of total mass. Biomass is estimated at 10−10 (5.5×1014 kg, see Bar-On, Yinon M.; Phillips, Rob; Milo, Ron. "The biomass distribution on Earth" Proc. Natl. Acad. Sci. USA., 2018).