I'm not following this so I don't really know, but when cutting edge science is reported via the web it is often difficult to know what is and is not the current situation. You may have several different announcements over a period of months each slightly different, as the research progresses. Journalists may use old announcements rather than the latest. Google gives prominence to the most viewed rather than the most recent. The whole experience becomes rather confusing. This is what I have found from Genetic Genealogy anyway, but it sounds to me like the Mass is something that there is some debate about and you want to find the most current statement from the actual astronomers involved rather than rely on second hand news.
