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Squarespace this is earth you live here
on this planet somewhere and everything
that you've ever known is located right
here but just how small exactly is Earth
when compared to the scale of the entire
universe let's start by zooming out to
where we can see our nearest cosmic
neighbor the moon you may think that the
moon is very close to Earth since it
dominates our night skies but in reality
the moon isn't this close to our planet
it's actually about this far away three
hundred eighty four thousand four
hundred kilometers away from you right
now on average you could fit 30 entire
earth in between this distance and if
you somehow were able to drive a car at
a constant 100 km/h speed it would take
you about 160 days to drive the entire
distance
despite this incredible distance however
12 humans have actually set foot here
representing the farthest away that any
individual human has ever been away from
the earth and one of humanity's greatest
achievements this is what the earth
would look like from there if you were
standing there with them and if you
wanted to communicate with somebody back
at home it would take a message about
two and a half seconds to travel between
you and them since that's how fast the
speed of light can travel at this is a
photo that was taken on Mars and that
tiny dot that you see there is Earth as
seen from the Martian surface
on average Mars is an incredible 225
million kilometers away from Earth but
that distance can be as high as 400 1
million kilometers that means that
whenever humanity finally gets around to
landing a human on the planet that
person will be 986 times further away
from Earth than the astronauts who
landed on the moon were in addition the
time delay for sending a message from
Mars back to earth isn't just two and a
half seconds it's actually more like 20
minutes each direction which would
render instant communication in the
event of an emergency impossible when we
zoom out even further away we can find
the Voyager 1 space probe which is the
farthest away man-made object from Earth
it is currently located 138 AU's from
the earth a new meaning astronomical
unit which is the distance between the
Earth
and the Sun which means that Voyager 1
is 138 times further away from us than
the Sun is at some point on its long
voyage
Voyager 1 turned its camera around and
took this photograph it may not look
like much at first but in my opinion
this is the greatest single photograph
ever taken in all of human history this
tiny pale blue dot is earth and I don't
think that anybody has ever said
something as amazing about this as Carl
Sagan when he said if you look at it you
see a dot that's here that's home that's
us on it everyone you ever heard of
every human being who ever lived lived
out their lives the aggregate of all our
joys and sufferings thousands of
confident religions ideologies and
economic doctrines every hunter and
every forager every hero and coward
every creator and destroyer of
civilization every King and every
peasant every young couple in love every
hopeful child every mother and every
father every inventor and Explorer every
teacher of morals every corrupt
politician every superstar every Supreme
Leader every saint and sinner in the
history of our species lived there on a
mote of dust suspended in a sunbeam
Voyager one is currently traveling at 17
kilometers every single second but even
at that speed it won't break out of the
reach of our solar system for another
30,000 years once we go beyond the solar
system we arrive in our interstellar
neighborhood here we shift to the
Lightyear unit of measurement which is
the distance that light travels in a
full earthier or about 9.46 one trillion
kilometers the star Proxima Centauri
here is the closest other star to us
other than our Sun but it's still 4.24
light-years away from us to put that
into perspective if it was heading in
the right direction it would still take
Voyager 1 over 70,000 years to reach it
in other words if you drove your car at
100 kilometres an hour
in our previous example to the moon it
would take over six times longer than
the entire age of the universe is just
to finally get there and it wouldn't
even exist still when you arrived when
we zoom out even further we can see the
entire Milky Way galaxy inside of which
earth is located right here this yellow
dot is the farthest extent of humanity's
radio broadcast throughout history which
means that any possible aliens who live
outside of this range are totally
unaware of humanity's presence it's
complete silence outside of this yellow
dot as far as we are currently aware but
the entire galaxy spans over 100,000
light-years from end to end there are
over 100 billion stars and over 100
billion planets inside of our galaxy but
you have never seen the full glory of
the galaxy at night because 99% of the
stars that you can see with the naked
eye are limited to this small tiny
region right here
but even this massive galaxy is nothing
compared to the rest of what's out to
there zooming out even further and we
arrive at the local group of galaxies a
collection of 54 different galaxies that
is about 10 million light-years across
but zooming out even further and we can
see the Virgo supercluster of which the
local group here is just a tiny segment
of there are at least 100 other groups
of galaxies just like our own local
group inside of here and the distance
from one side to the other is a
mind-numbing 110 million light-years but
even the massive Virgo supercluster is
nothing but a quiet and tiny lobe of the
great Laniakea super cluster an enormous
structure that is home to our galaxies
as well as 100,000 other galaxies the
distance from one side to the other is
520 million light-years but from even
there we can zoom out all the way to the
entire observable universe and see that
even the Titanic Laniakea super cluster
is just a tiny and insignificant part of
everything this is the observable
universe and it contains everything that
we know of it is home to at least 2
trillion different
individual galaxies which together
contain more stars than there are grains
of sand on the entire earth the distance
from Earth to any side of the observable
universe is 46 point five billion light
years which means that the entire width
is 93 billion light years across what's
perhaps even more interesting however is
what actually lies beyond the observable
universe keep in mind that the
observable universe is all that we can
currently see and it's entirely possible
that the rest of the universe outside of
it is vastly larger and more fantastic
than we can possibly ever imagine
we simply don't know what else is out
there because the light from these
incredibly distant places has not yet
had enough time in the universe's
history to reach us yet back on earth
and the light from some places may never
reach us at all because some parts of
space very far away from Earth are
expanding away from us faster than the
speed of light that means that the light
from these places will never in an
infinite amount of time reach earth
meaning that even if Humanity is eternal
and exists forever there will still be
an unknown number of places in the
universe that we will never know about
or ever see so it is very likely that
it's unbelievably enormous as it seems
the observable universe is just a tiny
slice of what we can currently see of
the entire universe according to the
theory of cosmic inflation that was
proposed by dr. Alan Guth if it is
assumed that cosmic inflation began at
10 to the negative thirty seventh of a
second after the Big Bang and with the
assumption that the size of the universe
before inflation began was equal to its
age times the speed of light then this
would seem to suggest that at the
present day the entire universe is 150
sextillion times larger than the
observable universe that number for
reference looks like this with this many
zeros let this number sink in or just a
moment this would be similar to you
thinking that the entire observable
universe everything that you could see
was the size of a light bulb but then
realizing that in reality the entire you
is larger than the former planet of
Pluto imagine a light bulb in the center
of Pluto but we inside the light bulb
we're totally unaware that Pluto existed
outside of it and that's a similar
situation to this we are all so
unbelievably small but you shouldn't
worry because all that means is that
there is so much left out there for us
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