Hello,

"The new observations, made with the Westerbork Synthesis Radio Telescope in the Netherlands, show that the hydrogen gas in VIRGOHI 21 appears to be rotating, implying a dark galaxy with over ten billion times the mass of the Sun. Only one percent of this mass has been detected as neutral hydrogen - the rest appears to be dark matter."

"The results may also solve a long-standing puzzle about another nearby galaxy. NGC 4254 is lopsided, with one spiral arm much larger than the rest. This is usually caused by the influence of a companion galaxy, but none could be found until now - the team thinks VIRGOHI 21 is the culprit. Dr. Robert Minchin of Arecibo Observatory says; "The Dark Galaxy theory explains both the observations of VIRGOHI 21 and the mystery of NGC 4254."
Gas from NGC 4254 is being torn away by the dark galaxy, forming a temporary link between the two and stretching the arm of the spiral galaxy."

The link above contains "images" of this area.

I realize that this story broke a couple of weeks old, apologies if it was posted previously.

Enjoy, Vince