Courtesy Space Center Houston
How does an airplane fly with an 83-ton spaceship strapped to its back? It takes a lot of jet power. NASA chose this four-engine Boeing 747-123 to perform the herculean task. It piggybacked space shuttles 223 times during its career. On Saturday, Space Center Houston officially opens its Independence Plaza, featuring this plane, dubbed NASA 905. On top is a full-size space shuttle replica. Click through the images to see more of the exhibit.
Courtesy Space Center Houston
A steel tower at the exhibit will take visitors up an elevator where they'll enter both NASA 905 and the shuttle replica, which has been named Independence.
Courtesy Space Center Houston
Built in 1970, NASA 905 first flew as an airliner for American Airlines before NASA bought it in 1974. It was used for testing before it started ferrying space shuttles from California's Edwards Air Force Base to NASA's launch facility in Florida in the early 1980s.
Courtesy Space Center Houston
A message written by an unknown employee displays a little NASA humor. On the 747, where it connects to the shuttle, the message reads: "Attach orbiter here. Note: Black side down."
Courtesy Space Center Houston
These markings show the number of ferry flights completed by NASA 905.
Courtesy Space Center Houston
The aircraft was customized for maximum power. The 747 was stripped clean of everything in the main cabin, a NASA spokeswoman told CNN in 2012.
Courtesy Space Center Houston
To transfer NASA 905 from Houston's Ellington Airport 8 miles to Space Center Houston, the jet was dismantled into seven major loads. Once reassembled, it was moved during an event that organizers called "The Big Move."
Courtesy Space Center Houston
Aviation geeks will appreciate this: After NASA 905 arrived at the museum, specialized crews reattached its engines: four Pratt & Whitney JT9D-7J gas turbine engines, each producing 48,600 pounds of thrust.
Courtesy Space Center Houston
A crane lifts Independence atop NASA 905.
Courtesy Space Center Houston
Inside both the Independence and NASA 905, visitors can explore exhibits showing artifacts of the space shuttle program, which ended in 2011. Some exhibits will focus on how the shuttle era may affect future space exploration.

Story highlights

Museum unveils exhibit with first NASA 747 to ferry space shuttles

NASA 905 is a 747-123 model built in 1970 that flew the shuttle 223 times

The ex-American Airlines Jumbo Jet carried Endeavour, Discovery and Enterprise to their final destinations

CNN  — 

It may sound impossible to some, but once upon a time, airplanes regularly took off and landed with 83-ton spaceships on their backs.

Someone has wisely decided to put one in a museum.

On Saturday, Space Center Houston in Texas unveils an exhibit featuring one of two powerful Boeing 747s that NASA used to piggyback space shuttles thousands of miles across the country for decades. They called this particular plane NASA 905.

The museum is throwing a huge party for this 747, including astronauts, skydivers and fireworks – all centered around Independence Plaza, where a replica space shuttle called Independence sits on top of the airplane.

Visitors will be able to go inside both the 747 and the Independence to explore exhibits and artifacts from the space shuttle era.

Museum exhibits manager Paul Spana worked with a Boeing historian who provided photos detailing 747 interiors to help maintain accuracy.

“Aviation enthusiasts will be excited at the opportunity to see a 747 closer than they would at any airport,” Spana said.

But the flight deck will be off limits to visitors, at least during the first year, when crowds would have a hard time maneuvering the spiral staircase to the cockpit.

A few of the pilots and flight engineers from this airplane also are expected to be on hand for Saturday’s ceremony.

From the early 1980s to the end of the shuttle program in 2011, the 747s were called upon to ferry shuttles that landed in California back to launch facilities in Florida, flying low and slow, at 13,000-15,000 feet high and about 285 mph.

NASA 905 flew internationally, too, carrying the shuttle Enterprise to England and the Paris Air Show in 1983.

So, how did the 905 lift all that weight? For one thing, NASA stripped the plane’s main cabins clean.

It was pretty much the cockpit and a big empty shell. That was it. No seats, galleys, lavatories, bars. No passengers, luggage, food, water, cargo. Built for maximum power, maximum lift.

NASA changed the original 747 design by adding vertical stabilizers to the plane’s tail to improve directional stability.

It also did a lot of testing on how to attach the spacecraft to the airplane to achieve the best aerodynamics.

RELATED STORY: How the 747 can lift all that weight

NASA’s choice of the 747 to ferry the shuttle is just one more example of the importance of the aircraft.

Nicknamed the Jumbo Jet when it entered commercial service in 1970 with Pan Am, it was the world’s first wide-body airliner, offering unprecedented seating capacity and long range. It helped open up global air travel to an entire generation.

Forty-five years after its birth, the four-engine 747 is losing favor among some major airlines, which are trading them for more efficient, twin-engine wide-bodies.

RELATED STORY: Air France lets go of its 747s

NASA 905 started as a commercial airliner with American Airlines in 1970. NASA bought it as a testing aircraft four years later.

Reflecting typical button-down NASA culture, the name chosen for its customized 747 was the less-than-exciting Shuttle Carrier Aircraft, or SCA.

In 2012, NASA 905 ended its 42-year career after delivering the shuttles Enterprise, Discovery and Endeavour to their respective museums in New York, Virginia and Los Angeles. The 905 carried space shuttles 223 times.

Discovery flies into the sunrise above Kennedy Space Center on its final flight.
The shuttle rode atop a specially modified 747 from Kennedy Space Center in Florida to Dulles Airport near Washington.
The shuttle, seen here just after takeoff, will be transferred to the Smithsonian National Air and Space Museum for display.
Discovery flies over the Capitol in Washington. It made several passes over the National Mall, drawing cheers from the crowds that gathered to watch it.
The shuttle will officially become part of the Smithsonian's collection at a ceremony on April 19 at the air and space museum's Udvar-Hazy Center in Chantilly, Virginia. Here, the shuttle flies past the Smithsonian castle on the National Mall.

NASA’s only other Shuttle Carrier Aircraft — a 747-100SR-46 called NASA 911 — is on display at the Joe Davies Heritage Airpark in Palmdale, California.

CNN’s Larry Shaughnessy contributed to this report.