10. Dwarf galaxies and stellar formation
Dwarf galaxies that lived about 9 to 10 billion years ago had bursts of star formation, which implies that many, if not most, of the stars in such galaxies in the present-day universe form in the same way. This image shows 18 of the 69 galaxies studied.
NASA/ESA/A. van der Wel (Max Planck Institute for Astronomy)/H. Ferguson and A. Koekemoer (Space Telescope Science Institute)/The CANDELS team