SCIENCE

NASA's Moon Rocket: A Test That Went Boom

USAFri Jun 27 2025

A Limited Lifespan

NASA's Space Launch System (SLS), the colossal Moon rocket, faces an uncertain future. The current U.S. administration plans to retire it after just three missions, while some lawmakers advocate for an extension to five. Realistically, however, the SLS is unlikely to exceed this number, and any additional flights won't occur before 2040.

Private Rockets on the Horizon

The SLS is pivotal to NASA's Artemis program, aiming to return astronauts to the Moon. However, the White House suggests that cheaper private rockets could potentially replace the SLS for these missions.

Recent Tests: Success and Setbacks

Engine Test: A Success

This week, NASA tested new components for the SLS. In Mississippi, they successfully tested a new engine, the first of its kind since the Space Shuttle era. This engine is earmarked for the fifth SLS flight, Artemis V.

Booster Test: A Setback

Meanwhile, in Utah, NASA and Northrop Grumman conducted a test of a new booster designed for the ninth mission, Artemis IX. Unlike the engine test, this one encountered a significant issue. Just under two minutes into the test, the booster's nozzle exploded into many pieces. A video of the explosion is available online.

Looking Ahead

The booster that exploded was a test article, not intended for actual spaceflight. Its purpose was to collect data. However, the explosion underscores the challenges that must be overcome before the SLS can be used for additional missions.

questions

    What are the primary reasons behind the White House's push for cheaper commercial alternatives to the SLS?
    If the SLS booster is having a bad day, should it just call in 'rocket' and take a break?
    How do the Trump administration's plans to cancel the SLS program compare to the proposed extensions in Congress?

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