... Hubble unveils a deep sea of small and faint early galaxies . ... They are the smallest, faintest, and most numerous galaxies ever seen in the remote universe, captured by Hubble deep exposures taken in ultraviolet light. ... But they are 100 times fainter than galaxies typically detected in previous deep-field surveys of the early universe. ... If this sample of galaxies is representative of the entire population at this early time, then 80 percent of new stars formed in these small galaxies. ...