NASA SLS Mega-Rocket Could Lead to Skylab 2 Deep Space Station

The original Skylab space station (left) launched atop a Saturn V moon rocket. Skylab II (right) would blast off atop NASA's Space Launch System.

CREDIT: NASA Images

NASA's first manned outpost in deep space may be a repurposed rocket part, just like the agency's first-ever astronaut abode in Earth orbit.

With a little tinkering, the upper-stage hydrogen propellant tank of NASA's huge Space Launch System (SLS) rocket would make a nice and relatively cheap deep-space habitat, some researchers say.

They call the proposed craft "Skylab II," an homage to the 1970s Skylab space station that was a modified third stage of a Saturn V moon rocket.

"This idea is not challenging technology," said Brand Griffin, an engineer with Gray Research, Inc., who works with the Advanced Concepts Office at NASA's Marshall Space Flight Center in Huntsville, Ala.

"It's just trying to say, 'Is this the time to be able to look at existing assets, planned assets and incorporate those into what we have as a destination of getting humans beyond LEO [low-Earth orbit]?'" Griffin said Wednesday (March 27) during a presentation with NASA's Future In-Space Operations working group.

Astronauts would reach the Skylab II deep-space habitat aboard NASA's Orion Multi-Purpose Crew Vehicle. CREDIT: NASA /MSFC artist concept, Brand Griffin, Advanced Concepts Office

A roomy home in deep space
NASA is developing the Space Launch System (SLS) to launch astronauts toward distant destinations such as near-Earth asteroids and Mars.

The rocket's first test flight is slated for 2017, and NASA wants it to start lofting crews by 2021.

The SLS will stand 384 feet tall (117 meters) in its biggest ("evolved") incarnation, which will be capable of blasting 130 metric tons of payload to orbit. Its upper-stage hydrogen tank is big, too, measuring 36.1 feet tall by 27.6 feet wide (11.15 m by 8.5 m).

The tank's dimensions yield an internal volume of 17,481 cubic feet (495 cubic m) — roughly equivalent to a two-story house.

That's much roomier than a potential deep-space habitat derived from modules of the International Space Station (ISS), which are just 14.8 feet (4.5 m) wide, Griffin said.

The tank-based Skylab II could accommodate a crew of four comfortably and carry enough gear and food to last for several years at a time without requiring a resupply, he added.

Skylab astronauts took this photograph as they approached the orbiting laboratory on the the third and final mission in November 1973. 

Credit: NASA

Further, it would launch aboard the SLS in a single piece, whereas ISS-derived habitats would need to link up multiple components in space.

Because of this, Skylab II would require relatively few launches to establish and maintain, Griffin said. That and the use of existing SLS-manufacturing infrastructure would translate into big cost savings — a key selling point in today's tough fiscal climate.

"We will have the facilities in place, the tooling, the personnel, all the supply chain and everything else," Griffin said.

He compared the overall concept with the original Skylab space station, which was built in a time of declining NASA budgets after the boom years of the Apollo program.

Skylab "was a project embedded under the Apollo program," Griffin said. "In many ways, this could follow that same pattern. It could be a project embedded under SLS and be able to, ideally, not incur some of the costs of program startup."

The Skylab II deep-space habitat would be made from the Space Launch System's upper-stage hydrogen tank. 

CREDIT: NASA/MSFC artist concept, Brand Griffin, Advanced Concepts Office

Apollo 11 engines Recovered by Amazon's Founder Jeff Bezos

Amazon founder Jeff Bezos claimed success Wednesday in his mission to recover Apollo 11 moon mission engines that plunged into the ocean decades ago.

"We found so much," Bezos said in a blog posting e route to land after three weeks at sea for his Bezos Expeditions project.

"We've seen an underwater wonderland -- an incredible sculpture garden of twisted F-1 engines that tells the story of a fiery and violent end, one that serves testament to the Apollo program."

Bezos said many of the original serial numbers from the engines have been eroded, making identification difficult, but that his team would conduct a restoration.

"The objects themselves are gorgeous," he said.

"We photographed many beautiful objects in situ and have now recovered many prime pieces. Each piece we bring on deck conjures for me the thousands of engineers who worked together back then to do what for all time had been thought surely impossible."

Bezos said his team would have enough major components to create displays of two flown F-1 engines, and that a restoration would stabilize the hardware and prevent further corrosion.

"We want the hardware to tell its true story, including its 5,000 mile per hour re-entry and subsequent impact with the ocean surface," he said. "We're excited to get this hardware on display where just maybe it will inspire something amazing."

It was not immediately clear when or where the objects might be displayed, but Bezos said when he launched the project last year that he hoped they could be viewed at the Smithsonian's National Air and Space Museum in Washington.

The engines that rocketed astronaut Neil Armstrong and his crew toward the moon in 1969 were located deep in the Atlantic Ocean using sophisticated sonar equipment.

Bezos used private funds to raise the F-1 engines from their resting places 14,000 feet (4,267 meters) below the surface of the ocean, even though he has maintained that they remain the property of NASA.

NASA Administrator Charles Bolden welcomed the news.

"This is a historic find and I congratulate the team for its determination and perseverance in the recovery of these important artifacts of our first efforts to send humans beyond Earth orbit," Bolden said in a statement.

"We look forward to the restoration of these engines by the Bezos team and applaud Jeff's desire to make these historic artifacts available for public display."

See more pictures of the recovery at Wired.com