We may try to estimate this total mass using the mass of those stellar objects which we can observe, and making an allowance for unobservable matter.
(those stellar objects; can observe; we) (We; may try; to estimate this total mass using the mass of those stellar objects which we can observe, and making an allowance for unobservable matter) Context(We may try,List([0, 10))):(We; may try to estimate; this total mass) Context(We may try to estimate,List([0, 22))):(We; may try to estimate this total mass using; the mass of those stellar objects)
We may try,List([0, 10)) We may try to estimate,List([0, 22))
those stellar objects We We We
can observe may try may try to estimate may try to estimate this total mass using
we
to estimate this total mass using the mass of those stellar objects which we can observe, and making an allowance for unobservable matter
this total mass
the mass of those stellar objects