| In 1929 Edwin Hubble's systematic observations of other galaxies confirmed the red shift. |
| But of course it has structures in it, stars and galaxies and clusters of galaxies. |
| This will enable astronomers to probe the gaseous component of the early Universe to study the first stars, galaxies, and quasars. |
| One thing we can say about this starting value is that it must be very specially tuned if galaxies are to form in time. |
| Out beyond the galaxies, there are celestial objects called quasars, whose light has traveled at least 10 billion years to get here. |
| Astronomers believe that quasars are galaxies with very massive black holes in the center. |
