Opss....have i lost the dark matter ?

The dark matter was hipothised by Zwickly (?) in 1930 because the galaxies rotated 3-4 times speedder than the gravitational visible mass ' permission ;
later they observed the same anomalies in the rotation of galaxies ' clusters .
The stars ' distance is measured with the parallax , which , for definition , can have only positive values also if very very little ; the more probable reason , that a star has a negative parallax , is that an intermediate not visible body deviates the ligth by its mass .
We propose to you the consulting of 3 stars ' catalogues of our galaxy , in CDS Strasbourg : I/239/ hip main , V/109 Sky 2000 4 and I/239/tyc main .