Alpha Centauri
Look up at the night sky from the Southern Hemisphere
and you will see a bright star in the constellation Centaurus.
What looks like one star is actually three.
Welcome to Alpha Centauri —
our closest stellar neighbor.
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THE THREE STARS
ALPHA CENTAURI A
The largest of the three.
Almost identical to our Sun in size and temperature.
If you stood on a planet orbiting it —
the sky would look remarkably familiar.
Distance from Earth: 4.37 light years.
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ALPHA CENTAURI B
Slightly smaller and cooler than Alpha Centauri A.
It orbits its companion star every 79 years
in a complex gravitational dance
that has continued for billions of years.
Distance from Earth: 4.37 light years.
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PROXIMA CENTAURI
The smallest of the three — a red dwarf star.
Much dimmer than its companions.
But it holds a special distinction:
It is the closest known star to our Sun.
Distance from Earth: 4.24 light years.
In 2016, astronomers discovered Proxima b —
a planet in the habitable zone of Proxima Centauri.
The closest potentially habitable world
ever found outside our solar system.
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A GRAVITATIONAL FAMILY
Alpha Centauri A and B orbit each other
at roughly the same distance as
Saturn is from our Sun.
Proxima Centauri orbits both of them —
but from a much greater distance.
It takes approximately 550,000 years
to complete one orbit around its companions.
Three stars. One family.
Bound together by gravity
across unimaginable distances and time.
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COULD WE EVER GET THERE?
With our fastest current spacecraft —
the journey would take over 70,000 years.
But projects like Breakthrough Starshot
aim to send tiny probes at 20% the speed of light.
At that speed — 20 years.
Humanity is already planning the journey.
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WHAT THIS TELLS US ABOUT OURSELVES
Three stars — 4.24 light years away.
And yet humanity looks at them and says:
we want to go there.
Not because it is easy.
Not because we know what we will find.
But because something inside us
refuses to accept that we are confined
to one small corner of the cosmos.
That force — ancient and indomitable —
is the same force inside you.
Right now. Today.
It never left.
It is waiting.
ALPHA CENTAURI A · ALPHA CENTAURI B · PROXIMA CENTAURI
4.24 LIGHT YEARS FROM YOU.
STARGOK
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