NASA announces world’s biggest-ever rocket to take man to Mars and beyond

The first SLS unmanned developmental flight is targeted for the end of 2017

With the curtain coming down on the Space Shuttle Program, NASA has set its sights on the future with the announcement of a heavy-lift launch vehicle that is designed to take man beyond the moon to explore near-Earth asteroids, Mars and its moons, and beyond. Dubbed the Space Launch System (SLS) its configuration harks back to the Saturn V rocket-based systems employed to propel Apollo astronauts to the moon but also incorporates technology developed in the Shuttle Program.

The SLS will use a liquid hydrogen and liquid oxygen propulsion system, which will include the RS-25D/E from the Space Shuttle Program for the core stage and the Saturn V-derived J-2X rocket engine for the upper stage. However, initial development flights will also use solid rocket boosters. The SLS will have an initial lift capacity of 70 metric tons (154,324 lbs), which NASA points out is roughly the weight of 40 SUVs. An evolved SLS will then see lift capacity increased to 130 metric tons (286,600 lbs), which by NASA’s logic would be roughly the weight of 75 SUVs.

The initial SLS will weigh 2,500 metric tons (5.5 million pounds) and stand taller than the Statue of Liberty, at 97.5 m (320 ft) high. At liftoff it will generate 8.4 million pounds of thrust, which is 10 percent more than the Saturn V. The subsequent evolved SLS will weigh 2,950 metric tons (6.5 million pounds) and stand 122 m (400 ft) high. At liftoff it will generate 9.2 million pounds of thrust, which is 20 percent more than the Saturn V at liftoff.

NASA says the SLS’s architecture provides a launch vehicle that can be adapted to suit different missions through the use of different core stage, upper stage, and first-stage booster combinations. This flexibility is designed to allow it to more economically carry the Orion Multi-Purpose Crew Vehicle, as well as cargo, equipment and science experiments to as low as Earth’s orbit and as far as Mars and beyond. While NASA is looking to save money by having private companies ferry astronauts to the International Space Station (ISS), the SLS will also serve as a backup for commercial and international partner transportation services to the ISS.

The SLS was unveiled by NASA Administrator Charles Bolden and several members of Congress on Wednesday, with Bolden saying, “President Obama challenged us to be bold and dream big, and that’s exactly what we are doing at NASA. While I was proud to fly on the space shuttle, tomorrow’s explorers will now dream of one day walking on Mars.”

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