Εδώ: www.galaxyzoo.org/Tutorial.aspx στο συγκεκριμένο τμήμα της σελίδας υπάρχει αυτό το κομμάτι για τους γαλαξίες: Part 1C ... Merging Galaxies Sometimes, galaxies crash into each other, or come close. These are called merging galaxies. Merging galaxies are very interesting to astronomers because we think that large galaxies are built from mergers of small galaxies – if we see merging galaxies, we can see a snapshot of how that process happens. When you look for mergers, look for places where two galaxies appear to be merging into one. The galaxies should be close together, and you should be able to see some connection between them. In the trial or in your galaxy analysis, whenever you see this, click the button that says "Mergers". Ίσως ο δικός μας γαλαξίας είναι ένας merger! ...