Alejandro Turnbull (@SpaceAlex33) profile picture

Physics undergraduate @ucrcnas. Primarily available on bluer skies @alejandroturnbull.space

Joined May 2024
Photo by Alejandro Turnbull (@SpaceAlex33)Photo by Alejandro Turnbull (@SpaceAlex33)Photo by Alejandro Turnbull (@SpaceAlex33)Photo by Alejandro Turnbull (@SpaceAlex33)Photo by Alejandro Turnbull (@SpaceAlex33)Photo by Alejandro Turnbull (@SpaceAlex33)Photo by Alejandro Turnbull (@SpaceAlex33)Photo by Alejandro Turnbull (@SpaceAlex33)Photo by Alejandro Turnbull (@SpaceAlex33)Photo by Alejandro Turnbull (@SpaceAlex33)
The cancellation of the program happened under Trump. Donald Trump's FY2025 budget proposed cancellation of the program, which was implemented under FY2026. China is now the only country actively pursuing Mars Sample Return.
9
If by "the prior administration," @NASAAdmin means "the Biden White House," he is misremembering events. The Biden admin left MSR with this press release, where NASA was to take a reduced-cost dual-track approach with decision on which track deferred to 2026.
Interesting you have that perception. I actually have been a loud voice saying NASA pivoted too far with commercialization into areas where there was no obvious business case or market, unfairly shifting the impossible burden onto others, and have been working to fix that, bringing some balance to the Force and restoring core competencies, rebuilding the workforce, and turning NASA Centers into builders again. We will finish 2026 with 20,000 civil servants, up from 14,000 at the beginning of the year. And I am not aware of any science programs that I cut. Certainly, the prior administration canceled MSR, and rightfully so over cost growth (though I would love to re-attack and find a better, more affordable way to get those samples), and NASA science leadership has to be able to pivot away from older programs to invest in new missions. I know I helped add several missions, including MoonFall, SkyFall, and PROMISE, while championing a 'Nuclear NASA' to send missions to Enceladus and Uranus. For those who have doubts, talk to the people doing the work at the NASA Centers and decide for yourself.
1
1
40
Alejandro Turnbull retweeted
WE ARE PROUD TO SAY THAT WE ARE LIBERAL.
21
855
46
5,991
195,480
Everyone is posting about "how on earth will they sell this roadster with the thrusters" and the very simple answer is they will not "invite only" translation: "we will build five of them and you will never see one"
13
Alejandro Turnbull retweeted
The next breakthrough in Mars exploration could be closer than you think. Building on our heritage with @NASA's InSight and OSIRIS-REx missions, we've developed a streamlined, cost-effective concept to return Perseverance's Martian samples to Earth for scientific study.

13
74
14
418
13,119
also real funny how they're all trying to position you and your company as somehow anti-big tech when you brag on here about being a literal Thiel fellow and your startup is backed in part by Anthropic. Or sorry, Anthrowpic, as one of your fake influencers pronounces it.
13
Those four accounts have posted over EIGHTY reels in the last two weeks, all repeating the exact same data center water use crap. That looks super natural and like organic, grassroots support!
1
10
Hey @0xSigil real icky astroturfing job you're doing over on IG to promote your repackage of Qwen3.8 27B by pretending it somehow doesn't need data centers!
1
21
So in summary: do I think this is The Approach to AGI? No. But this is an interesting capability and I'm excited to see more serious projects do more interesting things with it.
2
The Python is really driving most everything else: building order and placement, attack timing, etc. But that's exactly why I find a model like this exciting: now, you can cheaply import some measure of actual intelligence into regular code.
1
4
So for full transparency: this is a work in progress and the Python rules are doing a lot of the work here. Jev is basically serving as an advisor to the Python, making decisions on army composition, target selection, which Home City cards to send, and which politicians to pick.
1
18
So for my sporadic return to this website: this weekend's project has been getting @typesafeai's Jev to play Age of Empires III. Behold: Jev (in an enormous Python harness courtesy of Claude) defeating the in-game AI on Easy difficulty.
1
44
Canning a mission with the potential to redefine our understanding of our solar system and burning its RTG on a bizarre retrofit of a ground test article in service of Moon Base silliness is not innovation. It's desperation for short-term gains that will cost us in the long run.
3
An Administrator and Administration that actually wants to cut through bureaucracy to deliver real science wins for the American people would take the existing MMRTG and use it for a mission concept that's already reasonably mature. That design is Uranus Orbiter and Probe.
1
5
Here's a thought: since we can apparently "just do things" under this administration, how about we "just" use the MMRTG reserved for an outer planets mission to, I don't know, do that, instead of this weird half-baked scheme to retrofit a ground test article?
Launch and landing costs are a reality for any mission, so setting those aside, if PROMISE costs even 20% of your low-end estimate, we simply will not fly it. That said, it would be crazy not to take advantage of hardware taxpayers have already invested hundreds of millions of dollars in, along with Pu-238 that continues to decay and lose roughly 2% of its potential each year. More than a decade has gone by. How much of this Pu-238 do you want to waste waiting for a mission that does not even exist? I understand the community sometimes likes to take a long time to reach consensus, but under this Administration, we can just do things and put wins on the board for the Moon Base and all the science and discovery it will enable. In my humble opinion, less debate and more frequent wins make it easier to advocate for more resources to do more science.
1
12
I think the physical practicalities of space resource extraction, exploitation, and in-space expansion merit more serious consideration than this scenario affords them. Maybe it's failure of the imagination on my part, but I struggle most to see how ASI solves those questions.
9
Writing up a detailed plan for how to govern a universe where that's possible while just kind of offloading the "how" of that ask onto ASI strikes me as being kind of like these memes:
1
14
While sending a slow probe to Alpha Centauri is probably kinda doable today given unlimited budget and a willingness to be very liberal with thermonuclear weapons, meaningful interstellar colonization is arguably the hardest problem anyone has ever seriously proposed.
1
6
I don't have much about their actual governance proposal to critique, I think that space travel, and especially interstellar travel, are just way, way, way, WAY harder than Larsen and @DKokotajlo give it credit for being. Not to mention other galaxies.
1
7