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5.9722 × 1024
- An Earth mass (denoted as or, where 🜨 is the standard astronomical symbol for Earth), is a unit of mass equal to the mass of the planet Earth. The current best estimate for the mass of Earth is M🜨 = 5.9722 × 1024 kg, with a relative uncertainty of 10 −4. It is equivalent to an average density of 5515 kg/m3.
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Earth's mass is approximately 5.97 × 10 24 kg (5,970 Yg). It is composed mostly of iron (32.1% by mass), oxygen (30.1%), silicon (15.1%), magnesium (13.9%), sulfur (2.9%), nickel (1.8%), calcium (1.5%), and aluminum (1.4%), with the remaining 1.2% consisting of trace amounts of other elements.
- 29.7827 km/s, (107218 km/h; 66622 mph)
- 0.99726968 d, (23h 56m 4.100s)
- 0.4651 km/s, (1674.4 km/h; 1040.4 mph)
The mass of the Earth can be determined using Kepler's method (from the orbit of Earth's Moon), or it can be determined by measuring the gravitational acceleration on the Earth's surface, and multiplying that by the square of the Earth's radius. The mass of the Earth is approximately three-millionths of the mass of the Sun.
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Mass and weight of a given object on Earth and Mars. Weight varies due to different amount of gravitational acceleration whereas mass stays the same. In common usage, the mass of an object is often referred to as its weight, though these are in fact different concepts and quantities.
In astronomy, planetary mass is a measure of the mass of a planet-like astronomical object. Within the Solar System , planets are usually measured in the astronomical system of units , where the unit of mass is the solar mass ( M ☉ ), the mass of the Sun .
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Earth is the third planet from the Sun in the Solar System. It is the only planet known to have life on it. The Earth formed about 4.6 billion years ago. [29] [30] It is one of four rocky planets on the inner side of the Solar System. The other three are Mercury, Venus, and Mars .
The solar mass ( M☉) is a standard unit of mass in astronomy, equal to approximately 2 × 1030 kg. It is approximately equal to the mass of the Sun. It is often used to indicate the masses of other stars, as well as stellar clusters, nebulae, galaxies and black holes.