Scientists now believe that there are many galaxies and that clusters of many galaxies make our Universe.
Continuing this trend of astronomical up sizing,
Galaxies are so large that stars can be considered particles next to them (Photo credit: Wikipedia)
the latest speculation among astronomers is that
may be the Universe we know is only one of the
English: The Fornax dwarf galaxy is one of our Milky Way’s neighbouring dwarf galaxies. The Milky Way is, like all large galaxies, thought to have formed from smaller galaxies in the early days of the Universe. These small galaxies should also contain many very old stars, just as the Milky Way does, and a team of astronomers has now shown that this is indeed the case. This image was composed from data from the Digitized Sky Survey 2. (Photo credit: Wikipedia)