It has taken Nature/Physics 13 billion years to create our Milky Way galaxy.  Last August, a group of scientist reported that they had replicated the same feat in about nine months.  While they only create a universe digitally, the simulation – named Eris – is the first one to accurately reproduce the details of a galaxy like ours.

/READ MORE// Stellar Explosion

Previous attempts at making such a large-scale simulation have produced galaxies with a bulge or a smaller than needed surrounding disc.  The difference with Eris, according to Piero Madau, astrophysist at the University of California, Santa Cruz, is the realistic star formation.  His team build the universe using equations that acurratly and precisely molded how exploding starts would expel gasses from the centre and create new stars in clusters throughout the Galaxy.

The findings boost the longstanding theory of Galaxy formation, known as the Lambda-Cold Dark Matter theory, which postulates that slow moving clumps of dark matter pull in visible matter and help shape it into galaxies.  Observations have supported the theory, but some physicists have been concerned that computer simulations about galaxy formation have been wrong.

“There is no need, as some had argued before, to abandon the theory” – Madau

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