I don’t really know
The mass of the International Space Station is approximately 420,000 kilograms.
The scientific unit of mass is the kilogram, symbolized as "kg." It is defined as the mass of the international prototype of the kilogram, a platinum-iridium cylinder kept at the International Bureau of Weights and Measures in France.
The SI unit for mass is the kilogram (kg).
In SI (the International System), mass is measured in kilograms.
The international (SI) unit for mass is the kilogram.
The international (SI) unit of mass is the kilogram.
The international unit for mass is the kilogram.
The mass of an astronaut does not change when she is visiting the International Space Station. Mass is a property that does not change, but the weight of a person does change in space.
Prototype Kg
kg (kilogram) is the international (SI) unit for mass.
The corresponding unit of mass is the kilogram in the International System of Units (SI).
The SI base unit of mass is the kilogram (kg). It is defined as the mass of a specific platinum-iridium alloy cylinder known as the International Prototype of the Kilogram (IPK), which is kept at the International Bureau of Weights and Measures in France.