As the public dreamt of a new home in the stars, NASA developed plans to make cosmic

colonization a reality.

The Apollo missions were laying the foundation for life on the lunar landscape.

But, just three years after the first landing, the United States ventured to the Moon for

the final time.

In the 1960's, NASA was developing ambitious offshoots for the Apollo Program - primarily

establishment of a Moon base intended to extend humanity's time on the Moon.

The Lunar Shelter-Laboratory or SHELAB was one of the concepts under consideration.

SHELAB consisted of a cabin with an airlock chamber and a lunar excursion truck equipped

with a flying belt for the astronauts.

Powered by fuel cells and batteries, the shelter would support two astronauts for 14 days.

It was believed that the lunar bases could be the start of a large permanent colony on

the Moon.

At the time, expanding on Apollo wasn't so far fetched.

The country's Cold War competition and desire to be first rapidly expanded the potential

of space exploration.

Two years after NASA began operations, the U.S. government allocated 500 million dollars

of the federal budget to the agency.

In just five years, the budget grew to 5.2 billion dollars which represented 5.3 percent

of all government spending.

NASA expanded facilities across the country: the Manned Spacecraft Center in Houston, the

Launch Operations Center at Cape Canaveral in Florida and the Mississippi Test Facility.

With the massive expansion came hundreds of thousands of jobs.

NASA's labor force peaked in the mid 60's with a reported 400,000 staffers and contractors.

The majority of NASA's resources went to the Apollo Program.

Between 1959 and 1973, the agency spent just over 23 billion dollars on human spaceflight

of which nearly 20 billion dollars was for Apollo.

That amount of money today would equate to over 130 billion dollars spent on one program

alone.

But by the 1970's, public attention was no longer above the clouds.

With the lunar landing achieved, attention shifted to the seemingly endless Vietnam War.

And that's where government funds went as well, putting a huge strain on the U.S. economy.

NASA's glory years were starting to lose their grandiose glow.

Budget cuts forced the agency to rethink the feasibility of its exploration plans.

And since the Apollo Program was expensive and risky, the agency's priorities started

to move towards other projects.

Ultimately, NASA decided to cut the Apollo Program and its deep space dreams, short.

In 1970, the flights planned for Apollo 15, 19 and 20 were cancelled, and the remaining

missions were renumbered.

The cancelled missions freed up resources for NASA's Skylab and Space Shuttle - programs

that were slated to launch over the next two decades.

Some of the astronauts who spent years training for Apollo, were reassigned to these programs

while others retired without ever making it to space.

The Apollo 17 astronauts would be the last men to land on the Moon.

Veteran Gene Cernan would embark on his second lunar trek.

During Apollo 10, he hovered above the surface but this time he'd touch down.

The other final moonwalker was Jack Schmitt.

He was the first scientist to be selected for an Apollo crew.

And rookie Ronald Evans would man the Command Module while his crewmates journeyed to the

Moon.

Apollo 17 launched on December 7th, 1972.

NASA selected the Taurus-Littrow region as the mission's landing location.

The nearby Shorty Crater was believed to hold evidence of past volcanic vents and geologist

turned astronaut Jack Schmitt would help provide vital insight of the area.

En route to the Moon, the astronauts got a view of home that had never been seen before.

One of the astronauts grabbed a camera and snapped a picture.

It's known as the Blue Marble Shot and it is the first photograph to capture the entire

Earth.

The picture became the center of a decades long debate between the Apollo 17 crew members,

each claiming they were the photographer.

After the snapshot, the crew made it to lunar orbit and eventually landed on the Moon without

major issue.

The astronauts deployed scientific instruments and collected lunar samples.

At the end of their first trip in the Lunar Rover, they hit a problem.

But just like Apollo 13, this snag would be solved with duct tape.

With the LVR running again, the team ventured to the rim of the Shorty Crater where they

observed orange soil, which was later found to be tiny spheres of colored glass likely

from a volcanic vent.

After about three days and a record 22 hours spent outside the lunar module, the astronauts

prepared to head back to Earth for the last time.

And with that, NASA's missions to the Moon came to a close.

The ambitious goals of the early Apollo Program had fallen like dominos synchronized with

NASA's depleting budget.

The space agency moved on to other projects that would remain in Low Earth Orbit.

Apollo 17 marked the world's last manned trip to another celestial body.

But while the Apollo Program came to an end, it's contributions to science did not.

And now, decades later, NASA is tracing a new path to the Moon.

The Apollo Program revolutionized all aspects of spaceflight.

To learn more about the development of the first lunar vehicle, check out this video.

You can find the rest of the Apollo series on the Seeker playlist page.

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The Apollo Program revolutionized all aspects of spaceflight.

To learn more about the development of the first lunar vehicle, watch the episode we

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