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Einstein was amazed that
a human
mind, weighing only 3 pounds, could fathom a universe so vast. This is
possible only because the universe is incredibly less diverse and
complex than it might well have been.
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We define “our universe” as all we could
possibly
observe or be influenced by. The green arrow indicates the maximum
distance light can have traveled since the beginning of time. Light
from the galaxy at the bottom hasn’t had enough time to reach us, so it
isn’t in our universe. Due to the universe’s expansion, whatever lies
beyond, even a dreadful monster, can never reach us.
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Even in a peaceful galaxy like our Milk Way, its
center is non-survivable and its outskirts
have
too little carbon to support life. Life is possible only in the narrow
“Goldilocks Zone” — not too close and not too far from the center. Our
Solar System is in just the right place.
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| The more science learns
about our world and our universe, the more amazing are all the
incredible circumstances that enable our existence. |
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