Said of two or more liquids that are mutually soluble (i.e. they will dissolve in each other) (McGraw-Hill, 1974). The chemical property of two or more phases that, when brought together, have the ab
ility to mix and form one phase (after AGI, 1980).
The unseen mass whose gravitational influence is needed to account for the way galaxies rotate, and also to bind clusters of galaxies together. It is thought to consist, in part, of giant halos of dar
k matter that surround the visible portions of galaxies, and similar material that invisibly occupies the intergalactic voids.
A Mission Manager is a rolename used by theESA. The Mission Manager corresponds to the Project Manager role used byNASA but the Mission Manager role only begins after the launch of themission.