The observation based on motions of stars and matter clouds is that the gravitational mass of the combined matter of galaxies is insufficient, by itself, to explain the cohesiveness of the structure. Something is essentially holding the galaxies together gravitationally. Measurement of the rotation velocities involved suggest invisible matter some ten times more massive than the visible matter. This invisible matter goes by the placeholder label of 'dark matter'.
That its composition is hypothetical is not in dispute. That something which fits the label exists and produces measurable effects is also not in dispute.
And once again, the prudent course is not to accept the findings merely on the credentials of the people presenting them, but on the peer-reviewed literature which is not kept secret.
That its composition is hypothetical is not in dispute. That something which fits the label exists and produces measurable effects is also not in dispute.
And once again, the prudent course is not to accept the findings merely on the credentials of the people presenting them, but on the peer-reviewed literature which is not kept secret.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'
