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Joshua Tan

@joshuatan

Astronomer, CUNY, AMNH

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31.07.2023
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Latest posts by Joshua Tan @joshuatan

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Everything is the crisis and everything is a distraction May Renee Nicole Goodโ€™s memory be a blessing

I wrote about the murder of Renee Nicole Good and the deadly strategy, as Steve Bannon once called it, of flooding the zone with shit.

New Racket.

theracket.news/p/everything...

09.01.2026 22:00 ๐Ÿ‘ 219 ๐Ÿ” 59 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 5
NINA & Seestar Tutorial #I: Initial Setup
NINA & Seestar Tutorial #I: Initial Setup YouTube video by Astronomy Tips & Reviews with Curtis

There is a โ€œtime lapseโ€ mode which should work for those purposes. You can also use NINA to get pretty good telescope control for such projects: youtu.be/Cu50eBfxTJc

09.01.2026 13:46 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Exoplanet Watch Overview - NASA Science Who we are:ย Aย NASA citizen science project, sponsored byย NASA's Universe of Learning, we help anyone explore exoplanets at any level, from

Look into joining Exoplanet Watch. science.nasa.gov/citizen-scie...

09.01.2026 13:19 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Preview
Exoplanet Watch Overview - NASA Science Who we are:ย Aย NASA citizen science project, sponsored byย NASA's Universe of Learning, we help anyone explore exoplanets at any level, from

science.nasa.gov/citizen-scie...

09.01.2026 13:19 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
ุงูˆ ู…ุฏุฏ-

"Get out of the car," one agent says in the

video, using an expletive as he

approaches the vehicle and tries to open
the driver's side door.

ุงูˆ ู…ุฏุฏ- "Get out of the car," one agent says in the video, using an expletive as he approaches the vehicle and tries to open the driver's side door.

But it was Mayor Jacob Frey of Minneapolis โ€” just days into his third term - who abandoned the measured cadences of elected office altogether. "To
ICE," he said, "get out of Minneapolis," using an expletive. "We do not want you here." The self-defense narrative being

But it was Mayor Jacob Frey of Minneapolis โ€” just days into his third term - who abandoned the measured cadences of elected office altogether. "To ICE," he said, "get out of Minneapolis," using an expletive. "We do not want you here." The self-defense narrative being

Dear NYT,

ICE just shot a mom. You can spell out the expletives.

Thanks.

08.01.2026 11:19 ๐Ÿ‘ 372 ๐Ÿ” 58 ๐Ÿ’ฌ 10 ๐Ÿ“Œ 2

No rest until justice.

08.01.2026 13:23 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I have been looking for work that explores exactly how these differences were (not) operationalized, but have yet to find a really good one that looks at pre-Enlightenment attempts. I suspect this is because the assumption that pre-scientific revolution people didnโ€™t know better is so pervasive.

27.12.2025 11:55 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

While I have thought this too, there is quite a bit of historical evidence for an assumed divergence between them going back to antiquity. Some in the Church, for example, made a distinction between them as a means to condemnation of divination even as the Baconian distinction was not formalized.

27.12.2025 11:52 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Will she discuss the nearly certain option that it was a myth not based on any actual astronomical observation, but instead was attempting to match and counter other similar myths from rival sects? Heavenly portents being important, communities claimed they occurred decades later when they didnโ€™t.

08.12.2025 10:36 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Post image Post image

We're primarying John Fetterman.

Last week, Fetterman again sold out working Pennsylvanians. He was the deciding vote for a Republican budget bill that will strip healthcare from over 400,000 Pennsylvanians.

We deserve real working class leadership in the Senate, not a Trump-enabling Democrat.

18.11.2025 15:24 ๐Ÿ‘ 3254 ๐Ÿ” 750 ๐Ÿ’ฌ 55 ๐Ÿ“Œ 67
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The fallacies behind the cult of Loeb How media hype and misunderstanding fuel pseudoscientific fascination Existe una versiรณn en espaรฑol de este artรญculo aquรญ ย Introduction...

Looking for a good antidote to Avi Loebโ€™s ET advocacy? This excellent blogpost, in the spirit of Saganโ€™s Baloney Detection, offers rebuttals to the most pervasive and pernicious arguments you might find swirling around this topic. tinieblasyestrellas.blogspot.com/2025/11/the-...

16.11.2025 13:17 ๐Ÿ‘ 9 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

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.

16.11.2025 12:26 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Ok, these are just names of bars in the Tenderloin

16.11.2025 03:27 ๐Ÿ‘ 51 ๐Ÿ” 6 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 0
The top 20 accounts blocked in the last 24 hours. They're almost entirely US government accounts. And they're catching block numbers that would easily put them in the all-time top blocked list, just in the first day.

The top 20 accounts blocked in the last 24 hours. They're almost entirely US government accounts. And they're catching block numbers that would easily put them in the all-time top blocked list, just in the first day.

lol. lmao, even.

18.10.2025 08:30 ๐Ÿ‘ 2300 ๐Ÿ” 590 ๐Ÿ’ฌ 44 ๐Ÿ“Œ 95

I always thought Ecuadoran would make more sense than the usual โ€œEcuadoreanโ€. The country isnโ€™t named โ€œEcuadoreaโ€ after all.

15.10.2025 10:19 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Ecuador suffers a similar fate.

15.10.2025 02:09 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Agreed. In a past dream, I had wanted to follow in the research footsteps of Davis and Lineweaver, but I couldnโ€™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.

07.10.2025 18:03 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Tweet by David Sacks: "Wikipedia is hopelessly biased. An army of left-wing activists maintain the bios and fight reasonable corrections. Magnifying the problem, Wikipedia often appears first in Google search results, and now itโ€™s a trusted source for AI model training. This is a huge problem."

Tweet by David Sacks: "Wikipedia is hopelessly biased. An army of left-wing activists maintain the bios and fight reasonable corrections. Magnifying the problem, Wikipedia often appears first in Google search results, and now itโ€™s a trusted source for AI model training. This is a huge problem."

Someone should probably inform the White House's "AI & Crypto Czar" that no one is forcing AI companies to train their models on Wikipedia

29.09.2025 20:38 ๐Ÿ‘ 3169 ๐Ÿ” 563 ๐Ÿ’ฌ 97 ๐Ÿ“Œ 50
Preview
The FDA Plans to Review Mifepristone When junk science shapes policy, it's fascism

Take the threats about banning or restricting mifepristone seriously. Itโ€™s all based on junk science. open.substack.com/pub/vajenda/...

29.09.2025 18:28 ๐Ÿ‘ 293 ๐Ÿ” 107 ๐Ÿ’ฌ 9 ๐Ÿ“Œ 5
Screenshot: Sept 6, 2025 vaccine record indicating that I received the COVID booster in spite of the attempt by the health secretary to prevent me from getting it.

Screenshot: Sept 6, 2025 vaccine record indicating that I received the COVID booster in spite of the attempt by the health secretary to prevent me from getting it.

Suck it, RFK Jr!

I may have had to go to Connecticut, and I may have had to affirm having a condition that puts me at โ€œhigh risk for severe outcomes from COVID-19 virusโ€ which, if anyone asks, is โ€œbeing aliveโ€. In spite of the attempts of the antivax establishment to stop me, they could not!

06.09.2025 16:27 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

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 โ€œIs Pluto a planet?โ€ debateโ€ฆ but that is mostly because the stakes are so low.

20.08.2025 13:31 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

It was Peacockeโ€™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.

20.08.2025 13:27 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

He may not live long enough to get it.

20.08.2025 01:40 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

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.

19.08.2025 12:22 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

I suspect he was speaking with hand waving gestures to the concept of โ€œsolar systemโ€. Indeed โ€œinner solar systemโ€ is the scale Dyson first envisioned in what *I*, for one, consider to be a hellish nightmare concept.

19.08.2025 12:20 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Astrotopia A revealing look at the parallel mythologies behind the colonization of Earth and spaceโ€”and a bold vision for a more equitable, responsible future both on and beyond our planet. ย  As environmental, po...

Book recommendation: press.uchicago.edu/ucp/books/bo...

19.08.2025 12:09 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

*happen to

19.08.2025 12:07 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

But I think he is, sadly, acting out of the technoutopian hyperbole that did happen envision reprocessing stellar output at a 1 AU bubble.

19.08.2025 12:06 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

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 Dysonโ€™s imagination, sadly.

Yeah, enveloping a star is a waste and unstable (thus swarmsโ€ฆ even more scary).

19.08.2025 12:04 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

I blame the Star Trek TNG episode which snatched this obscure also-ran concept and brought it into the mainstreamโ€ฆ I kinda wish it would stay in science fiction since, like many of Dysonโ€™s proposals, it sits in my uncanny valley of the imagination to extravagance progression.

19.08.2025 12:00 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0