Joshua Tan
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joshuatan.bsky.social
Joshua Tan
@joshuatan.bsky.social
Astronomer, CUNY, AMNH
As someone who went to college with sweaty pete, I expect that his alcoholism and stimulant addiction may have resulted in certain limitations once they stopped spurring on his well-publicized dalliances.
November 16, 2025 at 12:26 PM
I always thought Ecuadoran would make more sense than the usual “Ecuadorean”. The country isn’t named “Ecuadorea” after all.
October 15, 2025 at 10:19 AM
Ecuador suffers a similar fate.
October 15, 2025 at 2:09 AM
Agreed. In a past dream, I had wanted to follow in the research footsteps of Davis and Lineweaver, but I couldn’t convince any cosmology mentors that this was a worthy direction to pursue. I had to settle for sprinkling references to their work liberally through Wikipedia.
October 7, 2025 at 6:03 PM
I think that inconsequential debates where the stakes are low are good for science comm. People are often surprised when I say that I will take either side of the “Is Pluto a planet?” debate… but that is mostly because the stakes are so low.
August 20, 2025 at 1:31 PM
It was Peacocke’s diatribe that convinced me that the expanding space view was misleading in part. David Hogg also once gave a great popular science lecture that explained the expanding universe starting from the Doppler effect, and that went so well that it is the approach I now take in Astro 101.
August 20, 2025 at 1:27 PM
He may not live long enough to get it.
August 20, 2025 at 1:46 AM
For sure extravagance is the whole point for Dyson, but it sometimes has knock off effects that I find uncomfortable to the point of being nearly disconfirming. It was not for nothing that Dyson was a climate change denier. I do see these as being related peccadillos.
August 19, 2025 at 12:22 PM
I suspect he was speaking with hand waving gestures to the concept of “solar system”. Indeed “inner solar system” is the scale Dyson first envisioned in what *I*, for one, consider to be a hellish nightmare concept.
August 19, 2025 at 12:20 PM
*happen to
August 19, 2025 at 12:07 PM
But I think he is, sadly, acting out of the technoutopian hyperbole that did happen envision reprocessing stellar output at a 1 AU bubble.
August 19, 2025 at 12:06 PM
For sure, the guy is riffing on subjects which he thought about for almost no time, and putting junk in space is likely the goal, but it is a *classic* goal and likely not out of place from Dyson’s imagination, sadly.

Yeah, enveloping a star is a waste and unstable (thus swarms… even more scary).
August 19, 2025 at 12:04 PM
I blame the Star Trek TNG episode which snatched this obscure also-ran concept and brought it into the mainstream… I kinda wish it would stay in science fiction since, like many of Dyson’s proposals, it sits in my uncanny valley of the imagination to extravagance progression.
August 19, 2025 at 12:00 PM
I think Altman is referencing Dyson spheres (obscure technosignature fever dreams of Freeman Dyson popularized by a Star Trek episode) which envelope an inner solar system in what I would describe as a pretty hellish fashion. All for “Type II Kardashev” energy extraction. What is misunderstood?
August 19, 2025 at 11:53 AM
I am going to start by contacting Mothership Strategies to see whether they can help remove my phone number from the spam text database: mothershipstrategies.com/contact/
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August 4, 2025 at 8:59 AM