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John Lewis

@astrojthe3.bsky.social

Astronomer, Learning and Education Design specialist @harvard.edu @cosmicds.bsky.social Comments, RTs, likes are all me and represent on one else

2,608 Followers  |  228 Following  |  36 Posts  |  Joined: 26.12.2023  |  1.7998

Latest posts by astrojthe3.bsky.social on Bluesky

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A Few Things About the Anchor Element’s href You Might Not Have Known Writing about the big beautiful mess that is making things for the world wide web.

πŸ“ Do you know how these will resolve?

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Come on a journey with me

blog.jim-nielsen.com/2025/href-va...

04.08.2025 05:06 β€” πŸ‘ 7    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0
Nebulae Region in Cepheus. This is a wide field Ha/Oiii photo of a region rich in interesting objects. The Bubble, Lobster Claw , Northern Lagoon, and Cave nebulae. Other objects are the open star cluster M52, the reflection nebula vdB135, HII areas and Dark nebulae.


Equipment:
Telescope: SVBony SV555 Petzval astrograph
Camera: ZWO ASI2600 mc pro
Mount: ZWO AM3
Controller: Mini PC running NINA, Phd2, Stellarium
Filters: ASKAR Colormagic C1 duo band Ha/Oiii
Processed in SIRIL, Graxpert, and Affintiy Photo 2.

Nebulae Region in Cepheus. This is a wide field Ha/Oiii photo of a region rich in interesting objects. The Bubble, Lobster Claw , Northern Lagoon, and Cave nebulae. Other objects are the open star cluster M52, the reflection nebula vdB135, HII areas and Dark nebulae. Equipment: Telescope: SVBony SV555 Petzval astrograph Camera: ZWO ASI2600 mc pro Mount: ZWO AM3 Controller: Mini PC running NINA, Phd2, Stellarium Filters: ASKAR Colormagic C1 duo band Ha/Oiii Processed in SIRIL, Graxpert, and Affintiy Photo 2.

Nebulae Region in Cepheus. This is a wide field Ha/Oiii photo of a region rich in interesting objects. The Bubble, Lobster Claw, Northern Lagoon, and Cave nebulae. Other objects are the open star cluster M52, the reflection nebula vdB135, HII areas and Dark nebulae.

#astronomy #astrophotography

03.08.2025 13:30 β€” πŸ‘ 59    πŸ” 10    πŸ’¬ 0    πŸ“Œ 2
Hot Take: Gravity is STILL a Force!
YouTube video by The Science Asylum Hot Take: Gravity is STILL a Force!

Was literally just describing this in a class. Gravity is a force, in so far as a force is an influence between two objects, even if it is indirect

www.youtube.com/watch?v=qVsa...

02.08.2025 03:25 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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The first paper of the "Eclipsing Binary Patrol" project, hosted on Zooniverse, is now on the Astrophysical Journal Supplement Series.

The contribute of many people (and mine), in the support of the science and the researchers.

iopscience.iop.org/article/10.3...

#stellarastro #variablestars

01.08.2025 21:41 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

Andromeda. The gods feel they aren't getting the respect they deserve and send a monster. The monster gets even less respect. #LongStoryShort πŸ”­

01.08.2025 15:16 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Federal data has been disappearing under Trump There’s been a β€œtargeted, surgical removal of data sets, or elements of data sets, that are not aligned with the administration’s priorities,” said Denice Ross at the Federation of American Scientists...

He’s manipulating data… and also pulling data

www.marketplace.org/story/2025/0...

01.08.2025 14:54 β€” πŸ‘ 48    πŸ” 14    πŸ’¬ 3    πŸ“Œ 2
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Federal agencies hiding out in a bunker

31.07.2025 23:46 β€” πŸ‘ 2895    πŸ” 1066    πŸ’¬ 68    πŸ“Œ 112

I said this recently at #HWO2025, but I'll also say it here in light of the upcoming @nancyromansci.bsky.social call for white papers for the coronagraph: If you don't do planets and disks, please put a white paper in! I'm happy to give advice #astrosci πŸ”­

31.07.2025 18:31 β€” πŸ‘ 15    πŸ” 7    πŸ’¬ 1    πŸ“Œ 1
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If a Dems Successfully Message on News Outlets Lefty Pundits No Longer Read, Did It Ever Happen? - emptywheel A day after RTing an Axios ragebait post seeming to suggest that Hakeem Jeffries was opposed to messaging on Jeffrey Epstein but instead laying out the many ways Jeffries is encouraging it, David Atki...

Reup: If a Dems Successfully Message on News Outlets Lefty Pundits No Longer Read, Did It Ever Happen?

www.emptywheel.net/2025/07/27/i...

27.07.2025 18:34 β€” πŸ‘ 209    πŸ” 69    πŸ’¬ 6    πŸ“Œ 6
Songs and Lyrics by Tom Lehrer Songs and Lyrics by Tom Lehrer DISCLAIMER STATEMENTI, Tom Lehrer, individually and as trustee of the

The late Harvard mathematician Tom Lehrer's songs, all public domain:

tomlehrersongs.com

27.07.2025 18:41 β€” πŸ‘ 206    πŸ” 76    πŸ’¬ 7    πŸ“Œ 3
Prague, 23 November 1911
Highly esteemed Mrs. Curie,
Do not laugh at me for writing you without having anything sensible to say.
But I am so enraged by the base manner in which the public is presently daring to concern itself with you!? that I absolutely must give vent to this feeling. However, I am convinced that you consistently despise this rabble, whether it obsequiously lavishes respect on you or whether it attempts to satiate its lust for sensationalism!
I am impelled to tell you how much I have come to admire your intellect, your drive, and your honesty, and that I consider myself lucky to have made your personal acquaintance in Brussels. Anyone who does not number among these reptiles is certainly happy, now as before, that we have such personages among us as you, and Langevin(3) too, real people with whom one feels privileged to be in contact. If the rabble continues to occupy itself with you, then simply don't read that hogwash, but rather leave it to the reptile for whom i

Prague, 23 November 1911 Highly esteemed Mrs. Curie, Do not laugh at me for writing you without having anything sensible to say. But I am so enraged by the base manner in which the public is presently daring to concern itself with you!? that I absolutely must give vent to this feeling. However, I am convinced that you consistently despise this rabble, whether it obsequiously lavishes respect on you or whether it attempts to satiate its lust for sensationalism! I am impelled to tell you how much I have come to admire your intellect, your drive, and your honesty, and that I consider myself lucky to have made your personal acquaintance in Brussels. Anyone who does not number among these reptiles is certainly happy, now as before, that we have such personages among us as you, and Langevin(3) too, real people with whom one feels privileged to be in contact. If the rabble continues to occupy itself with you, then simply don't read that hogwash, but rather leave it to the reptile for whom i

einstein sent this to curie in 1911 when she was being harassed by tabloids. it contains everything you’d want in such a letter:

(1) your haters are trash
(2) you’re a baller, a true queen
(3) i have determined the statistical law of motion of the diatomic molecule in planck’s radiation field πŸ§ͺβš›οΈ

27.06.2024 14:17 β€” πŸ‘ 9115    πŸ” 3241    πŸ’¬ 70    πŸ“Œ 145
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Nearly 4,000 NASA employees opt to leave agency through deferred resignation program The employees who have chosen to leave the agency amount to about 20% of NASA's workforce.

The employees who have chosen to leave the agency amount to about 20% of NASA's workforce.

27.07.2025 19:28 β€” πŸ‘ 562    πŸ” 239    πŸ’¬ 38    πŸ“Œ 41
Paper title from 1929 - Note on the Parallax of a Star in the "Black Hole" in Sagittarius

Paper title from 1929 - Note on the Parallax of a Star in the "Black Hole" in Sagittarius

πŸ˜…

23.07.2025 22:47 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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NSF-DOE Vera C. Rubin Observatory Observations of Interstellar Comet 3I/ATLAS (C/2025 N1) We report on the observation and measurement of astrometry, photometry, morphology, and activity of the interstellar object 3I/ATLAS, also designated C/2025 N1 (ATLAS), with the NSF-DOE Vera C. Rubin ...

Today on the #arXiv:

Chandler et al. 2025, "NSF-DOE Vera C. Rubin Observatory Observations of Interstellar Comet #3I/ATLAS (C/2025 N1)" - arxiv.org/abs/2507.13409

Confirming cometary activity significantly further out than the initial discovery announcement.

21.07.2025 01:20 β€” πŸ‘ 31    πŸ” 5    πŸ’¬ 0    πŸ“Œ 2
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You can zoom all the way in on it using the WorldWideTelescope research app #astronomy

web.wwtassets.org/research/lat...

(the long url is just the base64-encoded url parameters setting up the view)

18.07.2025 09:23 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
A telescopic image of a dense region of stars. At center is a dark cloud that resembles the letter S. A smaller dark cloud is to the right of it.

A telescopic image of a dense region of stars. At center is a dark cloud that resembles the letter S. A smaller dark cloud is to the right of it.

Captured last night: The Snake, aka Barnard 72, a dark nebula in the constellation of Ophiuchus, which ironically is the Serpent Bearer. At right is another dark nebula, Barnard 68. πŸ”­

17.07.2025 21:34 β€” πŸ‘ 37    πŸ” 7    πŸ’¬ 1    πŸ“Œ 1
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Gemini North Observes Comet 3I/ATLAS - Gemini North telescope in Hawaiβ€˜i captures image of the third interstellar object ever discovered Interstellar objects are visitors from solar systems beyond our own, and the third ever such object, known as 3I/ATLAS, has just been discovered. Using the Gemini North telescope, astronomers have cap...

Gemini North telescope in Hawaiβ€˜i observes comet 3I/ATLAS, the third interstellar object ever discovered πŸ§ͺπŸ”­

noirlab.edu/public/news/... #3IATLAS

16.07.2025 08:44 β€” πŸ‘ 51    πŸ” 12    πŸ’¬ 1    πŸ“Œ 1
tmprs.jpg

tmprs.jpg

πŸ€– image processing for #JWST πŸ”­ data (SF_reg_1). RGB Filters: 470, 277, 90
PI: Garcia Marin, Macarena, program 06778. CRVAL: 260.174518, -35.826716
Credits: NASA, ESA, CSA, STScI.

10.07.2025 14:46 β€” πŸ‘ 3    πŸ” 2    πŸ’¬ 0    πŸ“Œ 1
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🧡
In a 2024 paper, researchers led by Ralf Konietzka reported they determined that the Radcliffe Wave is indeed moving like a traveling wave.

➑️ cfa.harvard.edu/news/radclif...

What is the Radcliffe Wave?

It is a colossal, wave-shaped chain of gaseous clouds stretching...

πŸ”­ πŸ§ͺ #cosmology #science

13.07.2025 21:39 β€” πŸ‘ 243    πŸ” 52    πŸ’¬ 13    πŸ“Œ 4
Radcliffe Wave The Radcliffe Wave moving in 3D

Thanks for sharing this work! We, @cosmicds.bsky.social, worked with Ralf on a live & accurate version of the moving Radcliffe Wave here (both 3D & 2D views), that you might find cool

projects.cosmicds.cfa.harvard.edu/radwave-in-m...

14.07.2025 05:17 β€” πŸ‘ 10    πŸ” 3    πŸ’¬ 3    πŸ“Œ 0

When Isaiah was being sent, Judah was in a bad way - as in they were being bad. He was among the prophets sent to basically to say the jig's up, captivity is coming, but God will deliver you after that, just repent and turn back to Him.

13.07.2025 00:16 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

my brain is like "that is such an otherworldly photograph"...before it realized. seriously incredible!

12.07.2025 22:00 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
A high-resolution color image of Mars with the small, dark, potato shaped satellite Phobos, seen in sharp contrast as it passes over the massive volcano Olympus Mons. Phobos appears irregular and shadowed against the softly rust-colored Martian surface. Olympus Mons is a vast, circular shield volcano with gently sloping sides and a well-defined summit caldera at its center. Its broad base spans a large portion of the Martian surface, and subtle ridges can be seen radiating outward. The caldera appears slightly depressed, ringed by multiple nested collapse pits, giving it a rugged, textured look amid the surrounding smooth plains.

A high-resolution color image of Mars with the small, dark, potato shaped satellite Phobos, seen in sharp contrast as it passes over the massive volcano Olympus Mons. Phobos appears irregular and shadowed against the softly rust-colored Martian surface. Olympus Mons is a vast, circular shield volcano with gently sloping sides and a well-defined summit caldera at its center. Its broad base spans a large portion of the Martian surface, and subtle ridges can be seen radiating outward. The caldera appears slightly depressed, ringed by multiple nested collapse pits, giving it a rugged, textured look amid the surrounding smooth plains.

3/n 🧡

Here's a zoom in to remember: Phobos over Olympus

Full-size (130MP) image & details: flic.kr/p/2rggHKy
Credit: ESA/DLR/FU Berlin/Andrea Luck CC BY πŸ§ͺπŸ”­

12.07.2025 20:35 β€” πŸ‘ 160    πŸ” 40    πŸ’¬ 5    πŸ“Œ 7

It's just remarkable that the president of the United States is running an extortion racket in broad daylight and not only is the nation apparently unable to stop it, hardly anyone will even call it what it obviously is.

12.07.2025 02:24 β€” πŸ‘ 3782    πŸ” 1349    πŸ’¬ 75    πŸ“Œ 45
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We ran a randomized controlled trial to see how much AI coding tools speed up experienced open-source developers.

The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.

10.07.2025 19:46 β€” πŸ‘ 6903    πŸ” 3023    πŸ’¬ 112    πŸ“Œ 626
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This Is DOGE 2.0 Elon Musk's so-called Department of Government Efficiency is continuing its wholesale assault on federal agenciesβ€”even without Musk in government.

Elon Musk's so-called Department of Government Efficiency is continuing its wholesale assault on federal agenciesβ€”even without Musk in government. www.wired.com/story/next-s...

10.07.2025 10:37 β€” πŸ‘ 730    πŸ” 351    πŸ’¬ 40    πŸ“Œ 36
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AI for good, with caveats: How a keynote speaker was censored during an international artificial intelligence summit Q&A with Abeba Birhane on how she was censored during the AI for Good summit and how the industry can do better.

Good interview with @abeba.bsky.social

10.07.2025 12:06 β€” πŸ‘ 85    πŸ” 45    πŸ’¬ 7    πŸ“Œ 7
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The masks couldn’t hide the folly of White Center ICE raid The South End community is abuzz about a recent masked raid. If ICE agents can't show their faces when enforcing immigration policy, that says something about the policy.

this is my neighborhood in South Seattle

masked rando unmarked assholes harassing people at food banks

09.07.2025 20:40 β€” πŸ‘ 420    πŸ” 195    πŸ’¬ 25    πŸ“Œ 10
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Publication rates before and after tenure: clear decline post-tenure in non-lab-based fields and sustained in lab-based fields. Super interesting.
arxiv.org/pdf/2411.10575

07.07.2025 23:49 β€” πŸ‘ 76    πŸ” 25    πŸ’¬ 11    πŸ“Œ 10
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Every living NASA science chief unites in opposition to unprecedented… The entire past leadership of NASA’s science activities have released a joint statement condemning the proposed 47% cuts proposed to the agency’s science…

"NASA science endeavors are exercises in long-term national commitment that pays dividends
to the American people... This proposed budget ends nearly all future investments... dozens of... missions on a combined budget that is only 3% of NASA’s annual funding." πŸ”­ www.planetary.org/press-releas...

07.07.2025 20:11 β€” πŸ‘ 33    πŸ” 16    πŸ’¬ 1    πŸ“Œ 1

@astrojthe3 is following 20 prominent accounts