Galaxies

        I went on my evening walk listening to a lecture on Galaxies. They discussed how most galaxies are conglomerations of smaller dwarf galaxies- our Milky Way is one of these that draw smaller ones into it. The Magellanic Clouds, which are irregular dwarf galaxies, pass by the Milky Way and some of the mass is being exchange by both galaxies by tidal forces. There are remnants of smaller dwarf galaxies that have been observed, which were absorbed billions of years ago by our Milky Way. Other super large galaxies had just started out that way from the beginning and not by way of cannibalizing smaller galaxies. There are other kinds of galaxies, which take on many shapes and forms: spirals, elliptical, and irregular and many sub categories. Seyfert galaxies have a very bright nucleus, are believed to contain a supper massive black hole that emits high-energy radio waves from debris from its accretion disk surrounding and falling into its black hole. Kind of like Quasars but less energetic. When two large galaxies have a collision the dust of both, combine to form many new large blue stars that die in a matter of a few million years and can eventually spell the death of the newly formed galaxy by forming heavier elements from hydrogen and lighter elements that are used in the creation of new stars.