Hubble space telescope spies teenage galaxies
Ultraviolet images probe star formation 5 billion to 10 billion years ago

DEEP SPACE Ten thousand galaxies fill a tiny patch of sky in a new image from the Hubble Space Telescope. Ultraviolet light (blue) comes from star factories in galaxies that were active 5 to 10 billion years ago.
H. Teplitz and M. Rafelski/IPAC/Caltech, A. Koekemoer and Z. Levay/STScI, R. Windhorst/ASU, NASA, ESA