User talk:Astropartigirl/sandbox

Within this radius, the sphere obeys the virial theorem which says that the average kinetic energy is equal to minus one half times the average potential energy, and this radius defines the virial radius. (Suggestion would be to actually write the equation out in Math Mode in Wikipedia).

The virial radius of a gravitationally bound astrophysical system is the radius within which the virial theorem applies. It is defined as the radius at which the density is equal to the critical density... of the Universe at the redshift of the system, multiplied by an overdensity constant... (I think it seems a bit unnecessary to have this section italicized)

Compare this to the currently accepted cosmological model for the Universe,...in this case, we get that (I think that the use of "we" doesn't fit the tone of an encyclopedic article)