| They're searching for superdistant, ancient protogalaxies lurking behind huge clusters of galaxies closer to Earth. |
| But even as the stars and quasars within these protogalaxies began to light up, the universe as a whole remained dark. |
| Dark gas clouds are interesting because they could be protogalaxies,, or they could be debris from the formation of other galaxies,' Staveley-Smith says. |
| These foreground clusters act as lenses that magnify the light of the protogalaxies and allow us to detect and study them. |
| Hubble has shown us some of the first protogalaxies that formed, but nothing that looks like this. |
