Disk Galaxies Welcome! You are encouraged to register with the site and login (for free). When you register, you support the site and your question history is saved.Commonly called spiral galaxies, disk galaxies are formed in the universe from earlier, less flat, galaxies accumulate the mass of smaller nearby galaxies and rotate faster, thus flattening. galaxies are formed in the universe from galaxies take form in the universe when galaxies are formed in the universe, and when galaxies, formed in the universe when galaxies, formed in the universe from Review Answer