Earth mass

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An ”’Earth mass”’ (<var>M</var>_E or {{Earth mass}}, where {{unichar|1F728}} is the standard astronomical [[symbol for the Earth]]), is a unit of [[mass]] equal to the mass of the planet [[Earth]].

An ”’Earth mass”’ (<var>M</var>_E or <var>M</var>_🜨, where {{unichar|1F728}} is the standard astronomical [[symbol for the Earth]]), is a unit of [[mass]] equal to the mass of the planet [[Earth]].

The current best estimate for the mass of the Earth is {{Math|{{Earth mass}} {{=}} {{Val|5.9722|e=24|u=kg}}}}, with a [[standard uncertainty]] of {{Val|6|e=20|u=kg}} (relative uncertainty 10⁻⁴).<ref name=”AA”>The cited value is the recommended value published by the [[International Astronomical Union]] in 2009 (see [http://asa.usno.navy.mil/static/files/2016/Astronomical_Constants_2016.pdf 2016 “Selected Astronomical Constants”] in {{Citation | title = The Astronomical Almanac Online | url = http://asa.usno.navy.mil/ | publisher = [[United States Naval Observatory|USNO]]–[[United Kingdom Hydrographic Office|UKHO]]}}).</ref> The recommended value in 1976 was {{Val|5.9742|0.0036|e=24|u=kg}}.<ref>See [[IAU (1976) System of Astronomical Constants]].</ref> It is equivalent to an [[average density]] of {{Val|5,515|u=kg.m⁻³}}.

The current best estimate for the mass of the Earth is {{Math|”M”_🜨 {{=}} {{Val|5.9722|e=24|u=kg}}}}, with a [[standard uncertainty]] of {{Val|6|e=20|u=kg}} (relative uncertainty 10⁻⁴).<ref name=”AA”>The cited value is the recommended value published by the [[International Astronomical Union]] in 2009 (see [http://asa.usno.navy.mil/static/files/2016/Astronomical_Constants_2016.pdf 2016 “Selected Astronomical Constants”] in {{Citation | title = The Astronomical Almanac Online | url = http://asa.usno.navy.mil/ | publisher = [[United States Naval Observatory|USNO]]–[[United Kingdom Hydrographic Office|UKHO]]}}).</ref> The recommended value in 1976 was {{Val|5.9742|0.0036|e=24|u=kg}}.<ref>See [[IAU (1976) System of Astronomical Constants]].</ref> It is equivalent to an [[average density]] of {{Val|5,515|u=kg.m⁻³}}.

The Earth mass is a standard [[units of mass|unit of mass]] in [[astronomy]] that is used to indicate the masses of other [[planet]]s, including rocky [[terrestrial planet]]s and [[exoplanet]]s. One [[Solar mass]] is close to 333,000 Earth masses. The Earth mass excludes the mass of the [[Moon]]. The mass of the Moon is about 1.2% of that of the Earth, so that the mass of the Earth+Moon system is close to {{Val|6.0456|e=24|u=kg}}.

The Earth mass is a standard [[units of mass|unit of mass]] in [[astronomy]] that is used to indicate the masses of other [[planet]]s, including rocky [[terrestrial planet]]s and [[exoplanet]]s. One [[Solar mass]] is close to 333,000 Earth masses. The Earth mass excludes the mass of the [[Moon]]. The mass of the Moon is about 1.2% of that of the Earth, so that the mass of the Earth+Moon system is close to {{Val|6.0456|e=24|u=kg}}.