To piggyback on this, the Nature paper (which is paywalled) has a free preprint version here: http://www.eso.org/public/archives/releases/sciencepapers/eso1629

To piggyback on this, the Nature paper (which is paywalled) has a free preprint version here: http://www.eso.org/public/archives/releases/sciencepapers/eso1629/eso1629a.pdf http://www.eso.org/public/archives/releases/sciencepapers/es... (PDF)