The imaging results were added to get a more complete picture of the galaxy, which appears to be forming stars at a rate of about 13 solar masses per year (compared to our Galaxy's paltry one solar mass per year). The galaxy is a small, elongated disk shape, probably see nearly edge-on, with a mass of 2 billion solar masses, much smaller than the grand spirals and ellipticals we see in the Universe today.
The gas that was studied in absorption and emission lies well outside the disk, indicating that a "galactic fountain" is at work. This occurs when so much star formation creates a large number of supernovae that expel interstellar gas outside of the galaxy, thus shutting down the star formation. That gas can later "rain" back down on the disk, starting a new wave of formation.
NEWS: Hubble Discovers Far-Out Baby Planet
Young, small, star-forming and heavy-element rich galaxies were the building blocks of galaxies like our Milky Way. They brought with them their stars, planets, and gas through a series of mergers to form the bustling stellar metropolis we live in today. Did such systems have rocky, even habitable planets on them? Could life have begun even further into the distant past than our own planet? And if so... where did everyone go? These are the big questions that we can only speculate on, but at least we learn some amazing astrophysics along the way.