• Density


  • The mass density or density of a material is defined as its mass per unit volume.[1]
  • An object's mass divided by its volume. Cotton has a low density; lead has a high density. Red giants have a low density; white dwarfs have a high density. [2] Gas giants have a low density; terrestrial planets have a high density.

Density in astronomyEdit

  • The mean density of a celestial body is generally reckoned as its mass divided by its volume [2]
  • The g/cm³ is a unit used to qualify a celestial body's density.
  • As a reference, water density = 1 g/cm³.



  2. 2.0 2.1

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