Earth.
November 14, 1969.
Three astronauts, with spacesuits, food, water,
and a battery of scientific and communications
equipment, prepared to fly to the moon.
Thousands gathered at the Kennedy Space Center
in Florida, including President and Mrs. Richard
Nixon, to witness the historic launch.
It was raining that day, but that was no cause
for delay.
The ship that would carry them into space
was designed to launch in any weather.
But how would it respond to a powerful electrical
storm now gathering above the launch pad?
That was just the beginning of the incredible
journey of Apollo 12.
With three astronauts fastened into their
seats, the countdown proceeded.
Astronaut and Mission Commander Pete Conrad
would say later: “The flight was extremely
normal, for the first 36 seconds.”
The five engines of the Saturn 5’s huge
first stage were designed to burn through
5 million pounds of liquid oxygen in just
two and a half minutes, and to send the spacecraft
up 67 kilometers above the Atlantic Ocean.
When it reached an altitude of 2000 meters,
something unexpected happened.
Racing through the stormy environment, the
rocket generated a lightning bolt that traveled
down its highly conductive exhaust trail.
Another bolt hit 16 seconds later.
All of the spacecraft’s circuit breakers
shut off.
The tracking system was lost.
A young flight controller in Houston, Texas
instructed astronaut Alan Bean on how to turn
on an auxiliary power system.
The mission was back on track.
Once in Earth orbit, all systems appeared
to check out, and flight control officials
gave the crew the green light to leave Earth.
The astronauts were not told of concern that
the lighting strikes had damaged the pyrotechnic
system used to deploy the parachutes that
would ease them back through the Earth’s
atmosphere.
If that system failed, the astronauts would
not return alive.
This mission would have its share of perils,
not unlike those faced by a long line of past
explorers, whose courage and restless spirit
propelled them into the unknown.
This one, however, was backed by years of
technology development, test flights, astronaut
training, and the largest support team back
home that any mission ever had.
But hundreds of thousands of kilometers out
in space the three astronauts were pretty
much on their own.
What made Apollo 12 unique was the friendship
and chemistry of its crew.
Conrad, Bean, and Richard Gordon were all
Navy men.
Working and training together on the Gemini
program, they had gained each other’s respect
and trust.
Now, hurtling across more than 400,000 kilometers
to the moon, they prepared to fullfill the
mission’s goals.
One was to set up a scientific station designed
to record seismic, atmospheric, and solar
data.
Another was to visit an unmanned lunar probe
called Surveyor III that had landed there
two and a half years before.
The idea was to bring back a part to study
the effect of the lunar environment.
A third goal was to improve on the landing
of Apollo 11 just 5 months before.
Dropping down over a region called the Sea
of Tranquility, pilot Neil Armstrong found
himself heading straight for a crater full
of boulders.
He had to fly over the planned landing site
and find a new one.
Now kilometers beyond the target, the lander,
called Eagle, was literally running out of
gas.
With less than 30 seconds of fuel left, Neil
Armstrong and Buzz Aldrin finally touched
down on a landscape obscured by dust stirred
up by 
the vehicle’s thrusters.
Future astronauts would have to be able to
make precision landings at locations dictated
by science.
That meant they would have to touch down on
landscapes filled with all kinds of rocks
and craters.
For Apollo 12, the science pointed to a region
known as the Ocean of Storms, some 2000 kilometers
from where the Eagle had landed.
Here, the landscape is dark from lava that
cooled to form its flat expanse billions of
years ago.
Within it, an impacting asteroid had hollowed
out Copernicus crater, perhaps showering the
region with rocks blasted out from deep underground.
To sample this geological treasure trove,
the astronauts sought to land at a series
of smaller craters about 45 kilometers away.
After a journey lasting 83 and a half hours,
the crew fired the spacecraft’s engine to
go into an elliptical lunar orbit.
Five hours later a second burn put the spacecraft
into a circular orbit 111 kilometers above
the lunar surface.
The next day, Pete Conrad and Allan Bean entered
the lunar module, Intrepid.
Separating from the command module, they dropped
down toward their target.
Pete Conrad would rely on improvements in
the ship’s landing radar to find his way
to touchdown.
Pete Conrad and Alan Bean landed without a
hitch.
Now, they prepared to climb down the ladder
to experience a whole new world.
The plan was for Earth to experience it too,
courtesy of a color video camera that was
designed to send back a live signal.
Conrad was careful to keep it pointed away
from the Sun to protect its sensitive imaging
tubes.
Unfortunately, it caught the glare from Intrepid’s
shiny surface, and blew.
Back on Earth, the television networks cancelled
their coverage.
Millions of viewers then went about their
day.
Which left Conrad and Bean to go about theirs’.
The astronauts spent the first of two four-hour
moonwalks setting up science and communications
equipment, taking photographs, and seeing
what was there.
There were discoveries and surprises aplenty.
One was a series of mounds out in the open,
perhaps made up of material ejected from the
craters upon impact.
Two and a half hours into the moonwalk, the
astronauts flipped their wrist-mounted checklists
to their next task.
They opened an unlikely page, placed there
by the Apollo 12 back-up crew.
This little prank hardly distracted from their
central goal: to walk among the craters making
observations and picking up rocks.
That was part of a major, unheralded, scientific
quest of the Apollo program: to find clues
to where the moon came from.
At the time, there were three leading theories.
The so-called fission theory, championed by
George Howard Darwin, son of Charles Darwin,
held that the moon was once part of the Earth,
cast off by the rapid spin of its young parent.
That might explain the Pacific Ocean, a giant
hole in the Earth’s surface.
Then there was the capture theory, which held
that the moon was a wayward object that floated
through our solar system and was pulled into
orbit by Earth’s gravity.
A third idea came from the American astronomer
Thomas Jefferson Jackson See, known at the
time for his attacks on Einstein’s theories.
He suggested that the Moon formed near Earth
and gradually fell under its gravitational
spell.
In that case, moon rocks should resemble those
of Earth.
Finding out which theory is correct would
also yield clues to the formation of the solar
system at large, and perhaps even to the birth
of our own planet.
Day Two on the Moon.
Neither Conrad nor Bean had been able to get
much sleep.
Excitement got the best of them.
The pair now left Intrepid for a second, and
final, moonwalk.
The suits they wore had been built for spending
time on the Moon’s surface, with five layers
stitched together to maintain constant temperature
and air pressure.
Because direct exposure to the sun could heat
the suits to 120 degrees Fahrenheit, the innermost
layers circulated water around the astronaut’s
body to keep him cool.
On the outside was a shell to protect against
micro-meteors that routinely batter the moon’s
surface.
The astronauts found that lunar dust was so
abrasive that this outer layer quickly sustained
damage, and so fine that it crept into the
rotating wrist joints.
This time, the plan was to move out along
the edge of Surveyor Crater and pay the probe
a visit.
Along the way, there were pictures to take,
samples to collect, coring tools to drive
into the ground.
It was a world filled with optical illusions
and strange juxtapositions.
The lunar landscape appears monochromatic,
a bright gray.
With no atmosphere, the light is harsh, with
shadows cast in deep black.
But close up, the moon offers a variety of
rich and colorful details owing to its tumultuous
past.
The Ocean of Storms is an ancient basin that
was hollowed out by a huge impact and filled
with lava.
Finally, the team arrived at Surveyor.
They cut off select components to take back
to Earth.
Scientists would make a surprising discovery
lodged in the camera was a colony of bacteria.
Did it sneak into the component upon its return
to Earth?
Or, had it somehow survived for two and a
half years on the moon?
To this day, no one knows the answer to this
intriguing question.
One final stop remained: Block crater, where
a basketball-sized impactor had exposed the
lunar bedrock, leaving a wealth of new samples.
One rock they picked up is known as KREEP,
for potassium, rare earth elements, and phosphorus.
It’s thought to be a piece of bedrock that
formed over 4 billion years ago… on a lunar
surface that was entirely molten.
Just a few years later, this evidence would
coalesce into a radical new idea of the moon’s
origins.
At the dawn of the solar system, Earth shared
an orbit with a Mars-sized body now called
Theia.
Its orbit became unstable and it headed in
Earth’s direction.
Theia struck Earth at an oblique angle, causing
the Earth to spin faster and debris from both
bodies to fly into orbit.
When the dust settled, the debris began to
coalesce in Earth orbit, forming the Moon.
The moon, then, comes primarily from the outer
layers of the Earth and Theia.
That’s why overall the moon is less dense
than Earth.
From this violent beginning, the moon gradually
cooled, and the magma that lined its surface
hardened into a crust.
It was now time for Conrad and Bean to prepare
for the return flight home.
Along with their gear, they packed up 75 pounds
of scientifically priceless dirt and rocks.
In the years to come, these samples, and those
from the remaining Apollo missions, would
continue to yield clues to the history of
the moon, and its companion, Earth.
Even as Conrad and Bean lifted off from the
moon, there was still more science to do.
The lander rose up to join the command module,
docking flawlessly.
Conrad and Bean transferred their samples
and equipment.
Then they released Intrepid, sending it hurtling
back down to the Lunar surface.
The idea was to use the impact of a crash
landing to calibrate equipment that would
monitor moon quakes and asteroid impacts.
When it hit, the impact resonnated like a
bell for over half an hour, as seismic waves
rippled through the moon’s interior.
There was one more thing left to do: get home
safely.
Just before arrival, they gazed at a brilliant
scene of Earth moving across the sun.
Apollo 12 hit Earth’s atmosphere at 40,000
kilometers per hour.
The parachute pack opened just fine.
Not even a bolt of lightning could spoil this
trip.
The crew of Apollo 12 had shown how it’s
done, even adding flair to efficiency and
precision.
Well, almost.
At splashdown, Alan Bean got beaned by a camera
that had not been secured.
His five stitches would be forgotten.
What no one could forget was a camera magazine
filled with exposed film that had gotten jammed
and then accidentally left on the lunar surface.
Ironically, given the magnitude of their accomplishment,
the astronauts reported catching hell for
that oversight.
Conrad, Bean and the other astronauts of Apollo
will go down in history as the first to step
off our planet.
Four moon landings later, the program faded
away in the wake of declining expectations,
social discord, and the politics of those
turbulent times.
The incredible journey of Apollo 12 lives
on as a symbol for those who may one day revive
the instinct to travel beyond our planet,
in search of clues to the origins of our world,
and our place in the cosmos.
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