Page 21 - All About Space 68 - 2017 UK

M un
Mirrorirror
universeiverse

Rapid cooling
There are electrons, quarks Today
Janus point and other particles. The
After some time two cosmos rapidly cools,
distinct regions emerged, permitting quarks to clump
each with a shared past but into protons and neutrons.
a distinct future. The arrow
of time is opposite in each.

First stars
Inflation

Present day
After galaxies have
clustered together, they
spew out heavy elements
into space, which formed
the stars and planets.

Event horizon

Dark Ages

Communication off limits
The two universes cannot communicate
because we'd need to send a message back
through our past to reach their future.

“We mean there

are two halves, but
different things can

Big Bang Disorder from order happen in different
This patch of high entropy could have been the This leads to entropy increasing in two separate
seed for our universe, but eventually all particles directions – two regions with an arrow of time halves.” Jim Hartle
move outwards. reversed with respect to the other.

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