Formation of Galaxies

This animation illustrates a possible history for formation of galaxies in the Universe. According to this scenario, the basic building blocks that would assemble to form our present galaxies were already forming a few hundred million years after the big bang. Hubble Space Telescope observations at redshifts around 2 show irregular sub-galaxies containing of the order of billions of stars that are consistent with this scenario. Usage: Click "Play" to begin. Continue to click "Play" when action stops. "Home" returns to the beginning from any point.