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SLS test launch scrubbed again

NASA engineers once again were forced to scrub the launch of the SLS rocket today due to another hydrogen leak during fueling.

The launch director waived off today’s Artemis I launch attempt at approximately 11:17 a.m. EDT. Teams encountered a liquid hydrogen leak while loading the propellant into the core stage of the Space Launch System rocket. Multiple troubleshooting efforts to address the area of the leak by reseating a seal in the quick disconnect where liquid hydrogen is fed into the rocket did not fix the issue.

NASA has one more chance, on September 5th, to launch this rocket before it must return it to the assembly building to replace the flight termination batteries, used to abort the launch after liftoff should something go seriously wrong during flight. As I understand it, their use-by date is September 6th, and it would require a major safety waiver by the military range officer, who is entirely independent from NASA and under no obligation to it, to allow for a launch after that date with those batteries.

Conscious Choice cover

Now available in hardback and paperback as well as ebook!


From the press release: In this ground-breaking new history of early America, historian Robert Zimmerman not only exposes the lie behind The New York Times 1619 Project that falsely claims slavery is central to the history of the United States, he also provides profound lessons about the nature of human societies, lessons important for Americans today as well as for all future settlers on Mars and elsewhere in space.

Conscious Choice: The origins of slavery in America and why it matters today and for our future in outer space, is a riveting page-turning story that documents how slavery slowly became pervasive in the southern British colonies of North America, colonies founded by a people and culture that not only did not allow slavery but in every way were hostile to the practice.  
Conscious Choice does more however. In telling the tragic history of the Virginia colony and the rise of slavery there, Zimmerman lays out the proper path for creating healthy societies in places like the Moon and Mars.


“Zimmerman’s ground-breaking history provides every future generation the basic framework for establishing new societies on other worlds. We would be wise to heed what he says.” —Robert Zubrin, founder of founder of the Mars Society.


All editions are available at Amazon, Barnes & Noble, and all book vendors, with the ebook priced at $5.99 before discount. The ebook can also be purchased direct from my ebook publisher, ebookit, in which case you don't support the big tech companies and I get a bigger cut much sooner.


Autographed printed copies are also available at discount directly from me (hardback $24.95; paperback $14.95; Shipping cost for either: $5.00). Just email me at zimmerman @ nasw dot org.


  • pzatchok

    Do I look surprised?
    I would have been had it launched. Happy but surprised.

  • Ray Van Dune

    “…their use-by date is September 6th, and it would require a major safety waiver by the military range officer…”

    I cannot imagine a military range safety officer setting such a precedent, or being allowed to.

    My understanding is that NASA can try Monday if ready, or Tuesday if necessary. Either, not both. If not then, it’s back to the VAB until the October window. The question of the SRB expiry date would also no doubt come up, although at this point I have not heard that there is a stackable set of segments ready and positioned.

  • JhonB

    Just light the damn thing up and let it go. Explosions are fun too…..and make better headlines.

  • Jerry Greenwood

    During my early military flying days a wise LtCol told me the following.

    “It is better to be on the ground wishing you were flying than to be flying and wishing you were on the ground”. A truism that has saved me from disaster several times.

    “Get It Launched-itis”, like “get home-itis” is the pathway to disaster.

    NASA learned that lesson during the Shuttle Program. No one at NASA wants to be that guy.

  • GaryMike


    “It is better to be on the ground wishing you were flying than to be flying and wishing you were on the ground”.

    Not a terribly honorable “protect the folks at all costs” take on your voluntary oath to serve and protect.

    “I’ll do my duty if it fits my risk aversion.”

    Got it.

  • GaryMike: You very unfairly imply that Jerry Greenwood’s comment referred to military duty, when it had absolutely nothing to do with that. You owe him an apology.

    Greenwood was simply talking about the need to make sure your plane is flightworthy before taking off. You can’t serve and protect if you are a bad pilot, or a stupid one, and your plane crashes because you didn’t do due diligence beforehand about its operation.

  • Larry Elmore

    I would add, GaryMike, that it applies to weather, too, or have you forgotten the Challenger disaster?

  • GaryMike


    Trusting your judgement:


    Please accept my apology. I’m not as smart as I think I am. Many days I do not know what to think of me.


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