Bubble of galaxies spanning 1 billion light-years could be a fossil of the Big Bang
An immense bubble of galaxies, one billion light years wide and located 820 million light-years away, could be fossilized remains of the Big Bang.
TroibNews 
An immense bubble of galaxies, one billion light years wide and located 820 million light-years away, could be fossilized remains of the Big Bang.
