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When does Shabbat end? This astrophysicist thinks we’ve been getting it wrong
Aster Taylor observes Shabbat on their own time — literally.
For the past year, Taylor, a Ph.D. candidate in astrophysics at the University of Michigan, has been keeping Shabbat according to a schedule they devised using astronomical data.
So this Saturday, when Chabad of Ann Arbor says Shabbat will end at 9:09 p.m., Taylor will observe for nearly 11 more minutes. Where does Taylor, 25, get the chutzpah to challenge longstanding Jewish tradition?
“We live in the modern world. We have computers, we have catalogs of all the stars, and especially in the 80s, the construction of more significant telescopes,” Taylor told the Forward. “We have a pretty good understanding of how the sky affects our vision. So we can now just calculate this, right?”
They might have a point. In true “two-Jews-three-opinions” fashion, there’s actually no universally accepted time that Shabbat ends. But most people can agree on this: Shabbat ends at nightfall, defined by the Talmud as when three medium-sized stars in close proximity to one another are visible to the naked eye.
But what defines a medium-sized star and how close is close enough? Whose eyesight should be trusted? Those answers are not clear, leaving it up to rabbis to impart practical guidance.
Since without astronomical expertise, determining which stars make the grade is pretty difficult for the “average Joseph,” rabbis rely on proxy criteria. Today, many Orthodox communities use a standard credited to the venerable Rabbi Yechiel Michel Tucazinsky, who in 1929 determined three stars are visible when the sun sets 8.5 degrees below the horizon. Others follow the teachings of the 12th-century Rabbeinu Tam, who places nightfall 72 minutes after sunset.
But those approximations didn’t satisfy Taylor, an aspiring professor currently writing their dissertation about giant planet formation. Taylor craved a more scientific approach.
So for a few nights over several months, Taylor went to a local park, sat at a picnic table and every two minutes measured the sky’s brightness with a light meter.
Taylor settled on a brightness standard for a medium star — between magnitude 2 and 3 — and determined that three stars of that brightness need to be within 10 degrees of one another, close enough that an observer could see all three stars without moving their eyes.
Taylor then built a computer model to determine when three stars that meet those conditions become visible, taking into account various atmospheric conditions. That model became a web app that calculates Shabbat times for any given location and elevation.
The results were striking. Based on Taylor’s calculations, Shabbat should often end around 10 minutes later than the time given by the conventional approximation — no small discrepancy for those who faithfully observe the Sabbath.
Taylor’s computations are intriguing Jewish scholars. Masorti: The New Journal of Conservative Judaism has agreed to publish Taylor’s research paper on the topic this winter.
The Forward also shared Taylor’s findings with two rabbis: Yaakov Hoffman of the modern Orthodox Bridge Shul in Washington Heights, who wrote a scholarly article about Shabbat’s end, and Jack Shlachter — who in addition to being a retired rabbi in Los Alamos, New Mexico, just so happens to have a Ph.D in physics.
Both were impressed. “There’s always room for science to enhance these practices,” Shlachter said. “This author is doing things in a very admirable fashion — trying to be fully aware of tradition, but also incorporating more modern, sophisticated techniques.”
Hoffman said it was “very impressive” that Taylor “was trying to research these things from a contemporary astronomical perspective, and to really put so much effort and passion into accurate determination of the time.”
If Taylor “wants to add a few minutes to Shabbat,” he added, “that doesn’t bother me.”
What if Shabbat never ends?
As any city dweller knows, the stars don’t exactly come out in force at night.
Once Taylor factored light pollution into their calculations, it produced a somewhat uncomfortable result. In New York City, Taylor said, light pollution is so intense that three medium stars in close proximity will never be visible this year. In Jerusalem, only a few months of the year offer enough clear visibility to see Taylor’s criteria.
“The conditions that end Shabbat are never met,” Taylor said, “which is obviously a problem.”
Taken literally, that would mean endless Shabbat. In his paper, Taylor wrote that such a scenario would “require most observant Jews to quit their jobs, refrain from cooking, and spend their time studying Torah.” That would be both “unrealistic” and “lessen the sanctity” of the Sabbath, Taylor wrote.
Fortunately, there is a rabbinic workaround that dates back long before the age of light pollution.
The 16th-century Rabbi Yosef Karo wrote that on a cloudy day, one should wait to end Shabbat until “the doubt leaves his heart.” In other words, wait long enough after sunset to be certain that the stars theoretically would have been visible on a clear night.
Taylor agrees that the same principle for clouds can be applied to light pollution. But they argue that it’s still worth knowing just how much the modern night sky has changed.
Light pollution isn’t the only factor messing with the Jewish clock. President Trump is urging the Senate to pass a bill that would make daylight savings time permanent — a measure which many Orthodox Jews oppose because a later winter sunrise would mean a later morning prayer service, making many Orthodox Jews late for work.
But it also would also push Shabbat an hour later, which could mean a less frantic rush to get home before sunset on wintertime Friday afternoons.
Those potential changes raise a broader question. As modern life becomes increasingly divorced from the natural rhythms of the Earth, to what extent should Jewish practice evolve?
Taylor, who attends a Conservative synagogue, said they’re in favor of maintaining Jewish tradition when possible — but that doesn’t mean it can’t also be improved.
“We should be using a calculation like this in communities in the future,” Taylor said. “It’s a strict upgrade to the way we’ve been doing things in the past, and so I’m hopeful that we’ll start using this more widely.”
Paradoxically, in Taylor’s case, they believe modern technology enabled them to get closer to the literal meaning of the traditional text. It was the ancient rabbis, lacking that science, who had to settle for the next best thing.
The post When does Shabbat end? This astrophysicist thinks we’ve been getting it wrong appeared first on The Forward.
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‘Heil’ Mary? New Atlanta Falcons logo inspires Nazi comparisons
If there was something off about the logo the Atlanta Falcons unveiled on social media Wednesday, whoever runs their accounts did, uh, not see it.
Behind the black falcon graphic that began appearing on the football team’s helmets in the 1960s was a new background — a flag of red, tan, black and white vertical stripes. To thousands of people who responded to the logo, it looked distinctly German — in a 1930s kind of way.
“The Atlanta Falcons are preparing to invade Poland,” one fan wrote.
A day after its posting, the new profile picture had unleashed a deluge of Nazi memes in the 4,000-plus replies on X. One picture swapped in the logo for Nazi flags in the background of a historical photo of a Hitler rally. Another edited the Falcon claw to look like a Nazi salute.
Others depicted Hitler in a Falcons cap, references to Inglourious Basterds and the Battle of the Bulge and a World War II joke invoking a blown lead in Super Bowl LI.
“Falcons were up 28-3 at Dunkirk,” that tweet read.
The Falcons’ snafu enters a small but growing catalogue of Reich-coded brand mixups. Who can forget the German national soccer team’s ‘44’ soccer jerseys? There was also the swastika-emblazoned Hallmark gift wrap; the accidental Hitler mugs; and (for my money) the worst of the bunch, Zara’s concentration camp uniform shirt.
All of those have been addressed; so far, the Falcons’ has not. We’ve reached out to them for comment.
The post ‘Heil’ Mary? New Atlanta Falcons logo inspires Nazi comparisons appeared first on The Forward.
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Netanyahu’s Torah exemption pledge highlights election stakes
Sometimes a statement can contain multitudes, or at least provide a crystallizing moment in an election campaign. So it was when Benjamin Netanyahu, while criticizing the detention of about 40 Haredi draft evaders by military police at Ben-Gurion Airport this week, declared in a radio interview: “We need to protect the world of the Torah … But whoever doesn’t study must serve in the military.”
Netanyahu was effectively saying that yeshiva study should continue to be, as it has been under an informal arrangement, a free pass out of military service – and he went on to repeat a pledge to turn this into law. It is a position opposed by the overwhelming majority of Israelis.
The statement came amid such a calamitous two-week stretch for Netanyahu’s campaign leading up to the Oct. 27 election that it has some people joking that agents of the opposition might have infiltrated Likud headquarters and taken charge.
In a tragicomic episode, one of Netanyahu’s chief propagandists called leading opposition candidate Gadi Eisenkot – a former military chief who is of Moroccan Jewish background – a “monkey” who is under the control of Ashkenazi elites.
Yinon Magal, who has described himself as a vessel for Netanyahu’s messaging, made the comments on Channel 14, the pro-Netanyahu propaganda TV channel where he is the leading host. He later filmed himself explaining that the simian reference, in Israel’s mafia parlance, merely refers to a junior criminal who is a puppet of more heavyweight mafiosi. His clarification did little to stem the tide of criticism.
As Netanyahu awkwardly tried to distance himself, he also charged that opposition figures had used racist slurs, referring to a recent podcast interview with businesswoman Galia Albin in which she said his supporters are Mizrahis who plan to vote for him mindlessly.
Then came leaked comments (made last year) by Haredi Rabbi Dov Lando, leading spiritual leader of the Netanyahu-allied United Torah Judaism party – proclaiming that Zionism had brought disasters upon the Jewish people, that life under Arab rule would have been preferable and that religious Zionist soldiers were being killed because their rabbis taught them “distorted Torah.” Once again, outrage boiled over, and received mostly silence from the Likud.
Donald Trump’s enthusiastic endorsement of Netanyahu might have qualified as good news – but the U.S. president seemed to connect a Bibi reelection to a renewed assault against Iran. That rests on the dubious assumption that Israelis are eager for another few weeks (or more) in bomb shelters.
A punctuation mark arrived a few days later with reports, albeit unverified, that Netanyahu actually had planned to attack Iran earlier this month but was blocked by Trump. Many expected that scenario, which would have been interpreted as a gambit to delay, by dint of national emergency, an election in which he’s badly trailing in credible polls.
Polling is not available on every such twist and turn of the campaign, but decades of studying Israel and a nose to the ground tell me none of this is popular. And there is no question that most Israelis want to end the draft evasion by Haredim. Recent polls put support for that at 85 percent, which essentially means all non-Haredim.
The issue, as I have said before, is easily the most effective axe for the opposition to grind – because the current situation with the Haredim is utterly untenable.
Tens of thousands of Haredi men of military age remain outside the draft system, while soldiers and reservists from other communities carry an increasingly intolerable burden that has ,in many cases, reached hundreds of days a year.
Whether all those registered as yeshiva students genuinely study – a central question for some people – should be beside the point. Why should Torah study confer a privilege unavailable to Israelis studying physics, medicine, engineering or law? Why should one form of education exempt citizens from defending the country while every other form does not?
The consequences of the Haredi parties’ extortion extend far beyond the army. Israel has created an incentive system in which prolonged religious study preserves military exemptions, public subsidies and a way of life often characterized by economic dependence. Many Haredi educational institutions reject the core curriculum essential for participation in a modern workforce, even as the state helps finance them.
This is an extraordinary arrangement for a country whose security depends on its economic strength, and whose economic strength depends on scientific education, technological innovation and a highly skilled workforce.
Demography makes the issue existential. Haredim already account for roughly one-sixth of Israel’s population, and their exceptionally high birth rates – almost seven children per family on average – mean their share will continue to skyrocket. Unless patterns of education, employment and military participation change dramatically, Israel faces the prospect of an ever-smaller proportion of its citizens supporting and defending an ever-larger population.
The danger is compounded by the mobility of the people on whom Israel’s prosperity depends. Engineers, scientists, entrepreneurs and physicians have opportunities elsewhere. If enough conclude that the country’s trajectory has become irreversible, the resulting brain drain could be catastrophic.
Earlier this year, my friend Rabbi Hershel Grossman arranged for me to meet senior rabbis associated with the Mir and Hebron yeshivot. They were gracious and pleasant, but strikingly candid about their opposition to compulsory core education, military service and ordinary employment whenever these conflicted with Torah study. More troubling was their confidence that demographic change would eventually give their community decisive political power.
The necessary alternative is a comprehensive overhaul of the incentives governing Haredi education, military service and employment. Every child should receive a core curriculum. Young adults should perform military or meaningful national service, with appropriate accommodations for religious observance. Public funding should encourage economic participation rather than prolonged dependence.
Opposition parties promise various versions of such plans. None of this will be easy, and it will not be accomplished by dialogue alone. But the alternative is a version of national suicide. There is no question that – alongside accountability for Oct. 7 and the demand for an independent state commission of inquiry – the future of Haredi military service, education and economic participation belongs at the center of this election.
So why would Netanyahu effectively say that studying Torah should entitle an able-bodied young man to exemption from military service?
There are several possible explanations for this – and the rest of the parade of seeming political misjudgments.
One might be a calculated strategy of mobilizing the base through fear and resentment rather than persuading the center. This might be useful in various scenarios involving a messy outcome of the election.
The others might be overpowering hubris, a toxic contempt for the public or the myriad other pathologies that often accompany too long a time in power.
The post Netanyahu’s Torah exemption pledge highlights election stakes appeared first on The Forward.
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Tidbits: A publishing firm for Jewish writers excluded by mainstream publishers
Tidbits is a Forverts feature of easy news briefs in Yiddish that you can listen to or read, or both! If you read the article and don’t know a word, just click on it and the translation appears. Listen to the report here:
אין ניו־יאָרק איז די וואָך געגרינדט געוואָרן אַ פֿאַרלאַג פֿאַר ייִדישע און ישׂראלדיקע שרײַבער וואָס זאָרגן זיך, אַז זייער אָפּשטאַם אָדער מיינונגען קאָנען שטערן צום פּובליקירן זייערע ביכער.
לויט אַ סטאַטיסטיק פֿונעם מחבר מעג קין, איז בײַ די הויפּט־פֿאַרלאַגן, צווישן 2023 און 2024, געפֿאַלן מיט 76% די צאָל בעלעטריסטישע ביכער, וואָס דערמאָנען ייִדן, ייִדישקייט אָדער ישׂראל.
„הײַלײַן פּאָבלישינג סטודיאָ“, וואָס האָט דעביוטיִרט אין ענגלאַנד מיט אַ חודש צוריק, האָט געעפֿנט אַן אַמעריקאַנער צווײַג אין מאַנהעטן בײַ „פּאָרט סאַיִד“, דעם רעסטאָראַן פֿונעם וועלטבאַרימטן קוכער איל שני (עיאַל שאַני).
„הײַלײַן“ איז לאַנצירט געוואָרן דורך ניל בלער, דעם לאַנגיאָריקן ליטעראַרישן אַגענט פֿון דזשיי קיי ראָלינגס — דער שרײַבערין פֿון די האַרי־פּאָטער ביכער.
„איך האָב שוין פֿון לאַנג באַמערקט, אַז אַ צאָל שרײַבער קענען נישט געפֿינען קיין פֿאַרלאַג,“ האָט בלער געזאָגט. „נישט צוליב דער קוואַליטעט פֿון זייער שרײַבן אָדער אַ דוחק פֿון אָריגינעלע געדאַנקען, נאָר ווײַל זייער וועלטבאַנעם שטימט נישט מיטן קוקווינקל פֿון די פֿאַרלאַגן — אָדער אפֿשר ווײַל זייער משפּחה־נאָמען איז אַ ייִדישער אָדער ישׂראלדיקער.“
די פּראָבלעם, זאָגט ער, איז געוואָרן נאָך ערגער נאָך די טעראָריסטישע אַטאַקן פֿונעם זיבעטן אָקטאָבער, האָט בלער געזאָגט. ער האָט למשל דערמאָנט די שוועריקייטן בײַם געפֿינען אַ הויפּטשטראָמיקן בריטישן פֿאַרלאַג פֿאַר אַ בוך פֿון אלי שרבי (עלי שאַראַבי) וועגן זײַנע איבערלעבונגען ווי אַן ערובֿניק אין עזה — נישט געקוקט אויף דעם וואָס אין אַמעריקע האָט מען שוין געהאַט פֿאַרקויפֿט הונדערטער טויזנטער עקזעמפּלאַרן דערפֿון. צום סוף האָט זײַן בוך אַרויסגעגעבן אַ קליינער בריטישער פֿאַרלאַג, „סוויפֿט בוקס“.
„הײַלײַן“ וועט באַשטיין פֿון צוויי אימפּרעזומס: „אָדעסאַ עדישאָנס“ און „אַנטידאָט בוקס“. „אָדעסאַ עדישאָנס“, אָנגעפֿירט פֿונעם רעדאַקטאָר דזשעקי קלײַן, וועט דרוקן ייִדישע און ישׂראלדיקע בעלעטריסטיק און פֿאַקטפּראָזע אויף טעמעס פֿאַרבונדן מיט דער ייִדישער געשיכטע, אַנטיסעמיטיזם, פֿילאָסאָפֿיע, עסן און קולטור.
„אַנטידאָט בוקס“ וועט דרוקן פֿאַקטפּראָזע מיט אַ שייכות צו טעכנאָלאָגיע, עטיק, דעמאָקראַטיע, אידענטיטעט און מאַכט.
קלײַן האָט געזאָגט, אַז מע וועט אויך באַטראַכטן מאַנוסקריפּטן פֿון אַראַביש־ישׂראלדיקע און נישט־ייִדישע שרײַבער, וואָס זייער אַרבעט פֿאַרנעמט זיך מיט דער ייִדישער קולטור, געשיכטע אָדער געדאַנקען.
צו לייענען וועגן דעם אויף ענגליש גיט אַ קוועטש דאָ.
To read about this in English click here.
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