THE fireball of the big bang may have expanded faster in some places than
others, says a team of astronomers in Italy. They think this would explain why
there are mysterious giant voids in the Universe where few galaxies roam.
Astronomers have struggled to understand why galaxies seem to be grouped in
shells around huge voids millions of light years across. Our own Galaxy is on
the edge of such a void.
One possible reason for the voids is that the fireball that filled the
Universe shortly after the big bang did not expand evenly. Some areas may have
expanded…
