Congress frees Europa Clipper from SLS
It appears that Congress has at last removed its requirement that the unmanned probe Europa Clipper must be launched on the continually delayed and very expensive SLS rocket.
Almost unnoticed, tucked into the 2021 fiscal NASA funding section of the recently passed omnibus spending bill, is a provision that would seem to liberate the upcoming Europa Clipper mission from the Space Launch System (SLS).
According to Space News, the mandate that the Europa Clipper mission be launched on an SLS remains in place only if the behind-schedule and overpriced heavy lift rocket is available and if concerns about hardware compatibility between the probe and the launcher are resolved. Otherwise, NASA is free to search for commercial alternatives to get the Europa Clipper to Jupiter’s ice-shrouded moon.
Not only will this secure Europa Clipper’s launch schedule, which had deadlines imposed by orbital mechanics that SLS was not going to meet, the more than $1 billion in savings by using a SpaceX Falcon Heavy will allow the probe to do more while giving NASA more money for other planetary missions.
This is excellent news. It signals that Congress’s long love affair with SLS because of the ample pork it sends to many districts might finally be waning. If so, there is a good chance it will finally be killed, freeing up its bloated budget.
Sadly, in a sane world some of those savings would be used to reduce the overall federal deficit even as some was also used to expand NASA’s space effort. We are not in a sane world, however, so expect no reduction in the federal budget, at all.
Still, this is a move by Congress towards some fiscal responsibility that will make NASA’s efforts more efficient. For that small improvement we should be grateful.
Readers!
My July fund-raising campaign for 2021 has now ended. Thank you all for your donations and subscriptions. While this year’s campaign was not as spectacular as last year’s, it was the second best July campaign since I began this website.
And if you have not yet donated or subscribed, and you think what I write here is worth your support, you can still do so. I depend on this support to remain independent and free to write what I believe, without any pressure from others. Nor do I accept advertisements, or use oppressive social media companies like Google, Twitter, and Facebook. I depend wholly on the direct support of my readers.
If you choose to help, you can contribute via Patreon or PayPal. To use Patreon, go to my website there and pick one of five monthly subscription amounts, or by making a one-time donation. For PayPal click one of the following buttons:
If Patreon or Paypal don't work for you, you can support Behind The Black directly by sending your donation by check, payable to Robert Zimmerman, to
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It appears that Congress has at last removed its requirement that the unmanned probe Europa Clipper must be launched on the continually delayed and very expensive SLS rocket.
Almost unnoticed, tucked into the 2021 fiscal NASA funding section of the recently passed omnibus spending bill, is a provision that would seem to liberate the upcoming Europa Clipper mission from the Space Launch System (SLS).
According to Space News, the mandate that the Europa Clipper mission be launched on an SLS remains in place only if the behind-schedule and overpriced heavy lift rocket is available and if concerns about hardware compatibility between the probe and the launcher are resolved. Otherwise, NASA is free to search for commercial alternatives to get the Europa Clipper to Jupiter’s ice-shrouded moon.
Not only will this secure Europa Clipper’s launch schedule, which had deadlines imposed by orbital mechanics that SLS was not going to meet, the more than $1 billion in savings by using a SpaceX Falcon Heavy will allow the probe to do more while giving NASA more money for other planetary missions.
This is excellent news. It signals that Congress’s long love affair with SLS because of the ample pork it sends to many districts might finally be waning. If so, there is a good chance it will finally be killed, freeing up its bloated budget.
Sadly, in a sane world some of those savings would be used to reduce the overall federal deficit even as some was also used to expand NASA’s space effort. We are not in a sane world, however, so expect no reduction in the federal budget, at all.
Still, this is a move by Congress towards some fiscal responsibility that will make NASA’s efforts more efficient. For that small improvement we should be grateful.
My July fund-raising campaign for 2021 has now ended. Thank you all for your donations and subscriptions. While this year’s campaign was not as spectacular as last year’s, it was the second best July campaign since I began this website.
And if you have not yet donated or subscribed, and you think what I write here is worth your support, you can still do so. I depend on this support to remain independent and free to write what I believe, without any pressure from others. Nor do I accept advertisements, or use oppressive social media companies like Google, Twitter, and Facebook. I depend wholly on the direct support of my readers.
If you choose to help, you can contribute via Patreon or PayPal. To use Patreon, go to my website there and pick one of five monthly subscription amounts, or by making a one-time donation. For PayPal click one of the following buttons:
If Patreon or Paypal don't work for you, you can support Behind The Black directly by sending your donation by check, payable to Robert Zimmerman, to
Behind The Black
c/o Robert Zimmerman
P.O.Box 1262
Cortaro, AZ 85652
At least one good bit of news in the New Year!
It doesn’t really look like freeing Clipper from SLS, since it depends on SLS being available. Space vehicles, especially those for deep space, have to be designed with the launch vehicle in mind; it affects weight limits, dimensions, fuel load for maneuvering, orbital mechanics in terms of flight duration and possible gravity assists closer to the sun, and probably much more. If SLS is available, it can provide a shorter and more direct path to Europa than any other rocket currently in service.
The break with SLS needs to be explicit. Now.
Sadly, I don’t think Congress did this to save money. They refer explicitly in the legislative text to reports of torsional loading problems for Europa Clipper on the SLS as payload (from the solid rockets, apparently), and apparently NASA has reported to them that it’s a serious problem.
Either way, a decision for a launcher has to be made *now*, as JPL and NASA complete the CDR, so Congress could not put off any change to the requirement any longer. So hopefully we will hear from NASA in the coming weeks that they’ve formally decided to launch Clipper on a Falcon Heavy.