There has also been speculation that at least some part of the "missing mass" in the universe, which cannot be detected except by inference of its gravitational influences, may be composed of Majorana particles.

This "missing mass," they say, must be central to any explanation of how matter came together in its clumpy state.

But astronomers agreed that undetectable neutron stars in intergalactic space would not be plentiful enough to account for any significant fraction of the "missing mass" of the universe.

Further analysis could provide clues to the role in cosmic evolution played by this "missing mass," which may account for 90 percent of the matter in the universe.

Questions that Albert wants to try to answer, about Mach's Principle; and that Henrietta raised, with her talk about Point X and the "missing mass".

The existence of this "missing mass" is inferred from its gravitational effect on galaxies.

Stumpf is reporting that there may in fact be a third member of the system to account for the "missing mass."

But most of the "missing mass" remains missing.

What was the truth, they wanted to know, behind the "missing mass"-the fact that all the observable matter in the universe did not seem to weigh enough to account for the observed motion of galaxies?

It has to go on expanding for a while until the extra drag of the 'missing mass' that they have-somehow-added can begin to draw it back.