Sefer Haberit

Shekalim 14 ~ Love of The Other, The Drowned Duke, and Two People named Pinchas

On this page of Talmud we read about the miraculous recovery of a young lady who had drowned. It all begins with “a certain pious man who would dig pits, wells, and caves to collect water for passersby. Once his daughter was passing over a river for the purpose of marriage, and the river washed her away. And all the people came to console him, but he refused to accept their condolences.” The story continues:

שקלים יד, א

עָאַל רִבִּי פִינְחָס בֶּן יָאִיר לְגַבֵּיהּ בָּעֵי מְנַחַמְתֵּיהּ וְלָא קִבֵּל עֲלוֹי מִתְנַחֲמָה. אֲמַר לוֹן. דֵּין הִינּוֹ חָסִידֵיכוֹן. אָֽמְרִין לֵיהּ. רִבִּי. כָּךְ וְכָךְ הָיָה עוֹשֶׂה וְכָךְ וְכָךְ אִירַע

אָמַר. אֵיפְשַׁר שֶׁהָיָה מְכַבֵּד אֶת בּוֹרְאוֹ בַמַּיִם וְהוּא מְקַפְּחוֹ בַמַּיִם. מִיַּד נָֽפְלָה הֲבָרָה בָעִיר. בָּאָת בִּתּוֹ שֶׁלְאוֹתוֹ הָאִישׁ. אִית דְּאָֽמְרִין. בְּשׁוּכְתָּא אִיתְעֲרִײַת. וְאִית דְּאָֽמְרִין. מַלְאַךְ יָרַד כִּדְמוּת רִבִּי פִינְחָס בֶּן יָאִיר וְהִצִּילָהּ

Death of Leoplold of Brunswick.jpg

Rabbi Pinchas ben Yair came to visit him to console him, but he refused to accept condolences even from Rabbi Pinchas. Rabbi Pinchas said to the people of that community: Is this your righteous man, who will not be consoled and accept God’s judgment? They said to him: Rabbi, he would perform such and such acts of righteousness, by supplying water, and yet such and such tragedy, the drowning of his daughter, occurred to him.

Rabbi Pinchas said: Is it possible that he honors his Creator with water, and yet his Creator strikes him with water? Immediately thereafter, a report spread throughout the city: The daughter of that righteous man has arrived, as she did not actually drown. Some say she grasped a branch and pulled herself out of the river, and some say an angel in the form of Rabbi Pinchas ben Yair descended from heaven and rescued her.

It is a sad story with a happy ending. God could never let the daughter of a righteous person die. That was inconceivable. And certainly not by drowning, since her father was charitable with water. Let’s put aside for now the questions this passage raises about theodicy. Instead, let’s turn to another drowning event that occurred fifteen-hundred years later. It too involves the drowning death of innocent person, and by a remarkable coincidence, also involved a person named Pinchas.

Pinchas Hurewitz and his Sefer HaBerit

In 1797 a new Hebrew encyclopedia was published anonymously in Brno, which is now in the Czech Republic. It was called Sefer Haberit (The Book of the Covenant). It has a simple structure and is divided in two parts.  The first part, consisting of some two hundred and fifty pages, is a scientific encyclopedia, addressing what the author calls human wisdom (chochmat adam) and focuses on the material world. It deals with topics like geography, astronomy, biology and medicine. The second part, shorter than the first at only one hundred and thirty pages, is an analysis of divine wisdom (hochmat elohim), and focuses on the spiritual.  This part was written to explain a kabbalistic work called שערי קדושה (The Gates of Holiness) a mystical book written by the famous kabbalist Chaim Vital, who was himself a student of the even more famous Isaac Luria, known as the Ari.  

As we mentioned, the book was published anonymously, but in later editions the author revealed his name, though not much else. It was Pinchas Hurwitz, about whom few details are known. He appears to have been born in Vilna, Poland in 1765, and received a traditional Jewish education, but was forced to leave his studies at an early age as a result of both the dire economic situation and the physical threats then facing Polish Jewry.  He probably arrived in Frankfurt before his twentieth birthday and while there he met a number of maskilim and picked up a working knowledge of German. He then moved to Holland, where he must have endeared himself to many rabbinic leaders, before crossing to England, where again he met the leading Jewish religious intellectuals of the day. The most prominent of these was Eliakim Gottchalk Hart, an important Jewish intellectual and a wealthy jeweler, who provided financial support for Hurwitz during his time in England. Despite what appears to have been a comfortable time both physically and intellectually in London, for reasons that are not known Hurwitz returned to Poland, all the time working on his magnum opus.  In 1797 he finally published Sefer Haberit anonymously, and spent many years peddling his work from town to town.  It had taken a decade of travel and research, but Hurwitz understood the need of the hour and produced a work that was, and would remain, in great demand.

The Popularity of Sefer Haberit

In 1934, while studying at the famous yeshiva of the  Chofetz Chaim in Radon, Poland, a yeshiva bochur whose name is only known to us as Henech entered a competition in which he wrote an essay about his life. Here is part of what this twenty one year old student had to say:

I obtained a copy of the Book of the Covenant [Sefer Haberit]…and virtually committed it to memory, reading it in the bathroom for fear of being caught and confronted with a whole new series of accusations.  The Book of the Covenant gave me a sound foundation in anatomy, physics, geography and the like.  I had a weakness, however, for showing off my scientific learning to my friends (without telling them about its source). This led to my becoming known as a person of wide-ranging knowledge, and I was sought after by those who were drawn to the Haskalah.

Here then is testimony about the popularity Sefer Haberit as a work of science in pre-war Poland, over one hundred and thirty years after it was first published.  This book is still readily available modern Jerusalem. I bought my own modern edition of Sefer Haberit in a small bookshop in Meah Shearim in Jerusalem.  I had asked the owner if he might perhaps have a copy of the work.  Without moving from his position behind the counter he reached behind his shoulder and handed me a copy that had been published in Jerusalem in 1990. I not only appreciated the clear type and crisp pages of this modern edition, but was struck by the ease with which it had been obtained. 

In fact since it first appeared in 1797 Sefer Haberit has been published in over thirty editions. It was published in 1797, 1801 (twice, as bootlegged printings), 1807, and thirteen more times before the end of that century. It was published in 1900, 1904, 1911, 1913 (by three different publishers), 1920, 1960 and 1990. In addition it was published in Yiddish in 1898, 1929 and 1969, and in Ladino in 1847. This remarkable print run would be the envy of any modern author.

Isaac Bashevis Singer recalled that not only did he read Sefer Haberit as a child, but that his mother also was an avid reader of the work.

There were a number of holy books in my father’s bookcase in which I soulght answers to my questions.  One was The Book of the Covenant [Sefer Haberis] which I believe was already at that time a hundred years old and full of scientific facts.  It described the theories of Copernicus and Newton, and, it seems, the experiments of Benjamin Franklin as well.  There were accounts of savage tribes, strange animals, and explanations of what made a train run and a balloon fly.  In the special section dealing with religion were mentioned a number of philosophers. I recall that Kant already figured in there too.  The author, Reb Elijah of Vilna, a pious Jew, proved how inadequate the philosophers were in explaining the mystery of the world.  No research or inquiry, he wrote, could reveal the truth.  The author of The Book of the Covenant  spoke of nature too, but with the constant reminder that nature was something God had created, not a thing that existed of its own power.  I never tired of reading this book.

Sefer Haberit and LOve of the Other

Perhaps the most important section of this entire book is a long chapter – some 50 pages in all - called אהבת רעים – Ahavat Reim - The Love of Others.   In this section, Horowitz set out to re-teach a command that is, in his words עיקר דרך הקדוש ושורש כל התורה הקדושה - the entire point of attaining holiness and the foundation of the entire holy Torah.  In fact this section follows another called דרך הקדוש- The Way of Holiness, and was seen as the key to attaining religious heights that Horowitz had previously described. In this chapter he described a number of ways in which love of the other impacts our daily lives: in loving our families and in respecting the government, in being a model citizen and not cheating on our taxes, in treating our workers with the appreciation they deserve and by condemning domestic abuse, whether physical or verbal. 

Intro.jpg

The nature of loving others is for a person to love every kind of person, irrespective of their nationality or  language, but simply because the person is a human, formed in the image of God, and is someone involved in the development of humanity.  This involvement can be as a builder or farmer or businessman or merchant or or other kinds of job, like one who is an intellectual and investigate the world…for through these paths the world exists as it should, and is completed as God created it to be done, and as he made the Earth as “he saw that it was very good” for all of humanity…

 The Drowning Death of Prince Leopold

As any good teacher knows, stories have a far greater teaching impact than bland statements or impersonal statistics. So Horowtiz now gave an example of the importance of brotherly love. It was in fact the outstanding story of love of the other of his time, and it concerned the drowning death of Prince Leopold that had occurred in 1785. Here it is. Read it slowly. There is a lot to appreciate.

Death of Leopold 1.jpg

The question is whether we are naturally inclined to help others.  In answer to this, if we consider the nature of a person we will find that it is naturally inclined and desires to do good in the eyes of others, and tries to influence others to do so too; to have compassion on the poor, to rescue the oppressed, to release those who are imprisoned, to bandage the wounded , to heal the sick, to save those who are dying, share his knowledge with others, to teach students and instruct people in the correct way to behave and so on…

Experience has already demonstrated that on many occasions, even royalty and nobility have put themselves into mortal danger, battling fire and water in order to save others…as happened in Frankfurt on the Eder on the 17th of Iyyar 5545 (1785).

At that time the river bust its banks and swept away a number of villages and the houses in them.  In one village there were a number of wooden branches and window frames that were floating here and there, and a number of bodies of those who had drowned. Floating there was a tree trunk and on it was a person shouting to those on the shore to save him, but it was not possible to do so because of the strong current. 

When the nobleman Duke Leopold, Commandant of the city, noted this he immediately commanded any one who could do so to sail over to save the person. No one was able to reach the person, and they told the Duke it was not possible to reach him because of the strength of the current and the size of the waves.

And when the Duke heard this, he took it upon himself “I will sail over.” He put his life in his hands, and went over to save the life of that person. He had not reached half way across the river when his boat capsized and was swept away by the huge waves.  The righteous Duke was lost and could not be saved.  So we see that there is a natural inclination to help others.

The death of Prince Leopold gripped the imagination of Horowitz. It was the sine qua non of the love that one human being could and indeed should have for another.  Its importance was not only noticed by this Jewish author from Vilna. The great German poet Goethe wrote a poem about the incident:

Thou wert forcibly seized by the hoary lord of the river

Holding thee, even he shares with thee his streaming domain

Calmly sleepest thou near his urn as it silently trickles

Till thou to action art aroused, waked by the swift-rolling flood

Kindly to be to the people, as when thou still were a mortal

Perfecting that as a god, which thou didst fail in, as a man

And in the British Museum is this wonderful print called La Mort du Prince Leopold de Brunswick.

Death of Leoplold of Brunswick.jpg

Remember we are talking about eighteenth century Europe, which was not exactly a paradise for the peasants.  The constitutional monarchy that had ruled France for three centuries had not yet just been challenged by the French Revolution, and the American War of Independence had ended barely two years earlier.   And yet here was a nobleman who, without hesitation, gave his life to save an unknown commoners. It was this example that led Horowitz to conclude that not only was Love of the Other a commandment from the Torah; it was also a חוב מצד הטבע, a natural law.

Horowitz not only learned from the action of this righteous Gentile.  He extended Love of the Other to include non-Jews in a radical re-interpretation of the word רעיך -the other.   Normally translated as your fellow, Horowitz took it to mean that all contemporary Gentiles were included in this description.  He ruled that Gentiles were not idol worshippers, and also reinterpreted the verse that we read from the book of Jeremiah towards the end of the Passover Seder: :  שפוך חמתך על הגוים אשר לא ידעוך -“Pour out your wrath on the nations who do not know you.”  On whom should God pour out his anger? Only on those “אשר לא ידעוך” - who do not know Him. 

Yes, all are created equal. or not

Having established this inclusivity, Horowitz wrote about the way in which we should behave:

     על כן איש מחוייב להתנהג עם כל אדם וכל משפחות האדמה בטוב וביושר ובאחוה 

And so every person is obligated to act towards every person and every group on earth with goodness, with honesty, and with friendship

Note this language-we are required – מחוייב – to extend our love to all of humanity, irrespective of their race or ethnicity. To see how different this approach is, let’s compare it to a Jewish text that was recently published in the USA, where the Declaration of Independence states as a self evident truth that “all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.”  The contemporary Jewish book I am referring to is volume two of the Rennert edition of The Encyclopedia of Taryag Mitzvoth. This Encyclopedia has excluded anyone who is not Jewish from love of the other.

 
Explanation.jpg
 

In doing so, the Rennert Encyclopedia was following one school of halakhic thought in which the phrase “your fellow” is interpreted as “your fellow - in observing the commandments.” But there are lots of Jewish texts available to explain the details of the biblical command to love the other. Why not choose one with a maximalist reading? Surely we would want that from other religious traditions? If so, we must demand it from our own.

 
Only applies to Jews.jpg
 

We began with a story from the Talmud in which Rabbi Pinchas believed it was inconceivable that God could act in a way that was cruel or unjust. Today we know that cruelty and injustice are part and parcel of our fractured society. Racial and ethnic bias and discrimination are still all too common in a country in which all are supposed to have been created equal. We need more thinkers like the other Pinchas, Pinchas Hurwitz who read the command to love the other in a maximalist way. What better way to memorialize the death of Prince Leopold is there than follow this dictum:

     על כן איש מחוייב להתנהג עם כל אדם וכל משפחות האדמה בטוב וביושר ובאחוה 

And so every person is obligated to act towards every person and every group on earth with goodness, with honesty, and with friendship

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Tamid 32a ~ How High is the Sky? (And How to Measure It)

Tomorrow we will read a wondrous page of Talmud, that includes a discussion of astronomical distances.

תמיד לא, ב

:עשרה דברים שאל אלכסנדרוס מוקדון את זקני הנגב אמר להן

[תמיד לב, א]

מן השמים לארץ רחוק או ממזרח למערב אמרו לו ממזרח למערב תדע שהרי חמה במזרח הכל מסתכלין בה חמה במערב הכל מסתכלין בה חמה באמצע רקיע אין הכל מסתכלין בה

וחכמים אומרים זה וזה כאחד שוין שנאמר (תהלים קג, יא) כגבוה שמים על הארץ [וגו'] כרחוק מזרח ממערב ואי חד מינייהו נפיש נכתוב תרווייהו כי ההוא דנפיש ואלא חמה באמצע רקיע מ"ט אין הכל מסתכלין בה משום דקאי להדיא ולא כסי ליה מידי

Alexander of Macedon asked the Elders of the Negev about ten matters.

He said to them: Is the distance from the heavens to the earth further, or is the distance from east to west further? They said to him: From east to west is a greater distance. Know that this is so, as when the sun is in the east, everyone looks at it without hurting their eyes, and when the sun is in the west, everyone looks at it without hurting their eyes. By contrast, when the sun is inthe middle ofthe sky, no one looks at it, as it would hurt their eyes. [This shows that the sun’s place in the middle of the sky is not as far from the earth as its remote positions in the extreme east and west].

But the Sages say: This distance and that distance are equal, as it is stated: “For as the heaven is high above the earth, so great is His kindness toward them that fear Him. As far as the east is from the west, so far has He removed our transgressions from us” (Psalms 103:11–12). [The verses compare the extent of God’s kindness and His removal of transgressions to vast expanses.] And if one of the distances is greater than the other, let the verse write that both of God’s enumerated attributes are like the measure that is greater. But if so, with regard to the sun in the middle of the sky, what is the reason that no one looks at it? It is because it stands exposed and nothing covers it, [whereas it is partially screened when it is in the east or the west.]

Method for measuring the distance from the Earth to the Moon. From Joseph Delmedigo’s 1629 masterpiece, Sefer Elim, p152.

Method for measuring the distance from the Earth to the Moon. From Joseph Delmedigo’s 1629 masterpiece, Sefer Elim, p152.

Alexander on tour…

The path of the sun, based on the famous passage in Peaschim 94b.

The path of the sun, based on the famous passage in Peaschim 94b.

Historians know that Alexander the Great waged a famous campaign against Gaza and Egypt in 332 BCE. That would have placed him in or near the area in southern Israel known as the Negev, and it is while he was there that he asked the local sages whether the distance to the heavens is greater than the distance from east to west. To moderns, this is a silly question, but not to Alexander and his contemporaries. They believed that the world was a flat saucer, covered with water on which the earth floated in the middle. They also believed above us lay a solid vault that contained the stars, and which the rabbis referred to as the rakia. So which was greater, the distance up to the heavenly vault that held the sun and the stars, or the distance from one side of the earth to the other? It’s a fair question.

November 11 2019 - The Transit of Mercury

November 11, 2019: Mercury transits the sun from east to west. The horizontal yellow line represents the ecliptic, and the top is North. Make sure you are using a sun-filter on your telescope, and don’t try this with hand-held binoculars (too wobbly…

November 11, 2019: Mercury transits the sun from east to west. The horizontal yellow line represents the ecliptic, and the top is North. Make sure you are using a sun-filter on your telescope, and don’t try this with hand-held binoculars (too wobbly to see). From here.

And here is how it looks in real life through a telescope. Mercury is the black dot in the lower part of the image. At top is a more blurry sunspot. From here.

And here is how it looks in real life through a telescope. Mercury is the black dot in the lower part of the image. At top is a more blurry sunspot. From here.

On November 11, the tiny planet of Mercury will transit (that’s astronomy-speak for “passing in front of”) across the sun. These events get astronomers very excited. You may recall that back in June of 2012 Venus was in transit across the face of the sun, leading many to spend a sunny day peering into a telescope for a glimpse. (I did. It was amazing.)

Back in the nineteenth century, the transit of Venus was of huge scientific importance because by observing it from various locations and using some clever trigonometry, astronomers could calculate the distance from the Earth. Knowing this would allow the distance of other planets from the Earth to be calculated, which would then give the answer to one of the most important astronomical questions of the time: Just how big is the solar system?

Using the transit of Venus to determine the distance from the earth to the Sun. For a deep dive into how the math works see this delightful article in the December 2003 edition of Mathematics Magazine.

Using the transit of Venus to determine the distance from the earth to the Sun. For a deep dive into how the math works see this delightful article in the December 2003 edition of Mathematics Magazine.

The transit of Venus always occurs twice in eight years, followed by a gap of 105.5 or 121.5 years. The first time it could be viewed was in 1639, but that transit was witnessed by only two observers. By the time of the paired transits of 1761 and 1769, scientific instruments were accurate enough to provide the data needed for the all-important calculations. So in 1760 and again in 1768 the major European nations including Britain, France, Spain and Russia sent teams across the globe to measure the transit times of Venus. Perhaps the most famous expedition was that led by Captain James Cook who sailed from London to Tahiti and made a series of accurate measurements that allowed the all-important calculations to be made.

Anyway, in a couple of weeks the tiny planet of Mercury will also transit the sun. In the past, this event too could have been used to calculate the size of the solar system. But it wasn’t. The planet is just too small and too far away, and the telescopes of the time were too inaccurate for any scientifically valid measurements to be taken. Instead, astronomers waited for the larger and more visible planet Venus to transit, which also caught the attention of some important Jewish authors.

Three Jewish responses to measuring the size of the universe

  1. Sefer Haberit 1797

The first Hebrew book to discuss the transit of Venus was Sefer Haberit, The Book of the Covenant, first published in 1797 in Brno. That also makes it the first Hebrew book to discuss the measurement of astronomical distances.

The author was Pinhas Hurwitz, a self-educated Jew from Vilna. Sefer Haberit was divided in two parts; the first, consisting of some two hundred and fifty pages is a scientific encyclopedia, addressing what Hurwitz called human wisdom (hokhmat adam) and focuses on the material world. The second part, shorter than the first at only one hundred and thirty pages, is an analysis of divine wisdom (hokhmat elohim), and focuses on spiritual matters. Sefer Haberit was an encyclopedia, and contained information on astronomy, geography, physics, and embryology. It described all manner of scientific discoveries, from the barometer to the lightening rod, and gave its readers up to date information on the recent discovery of the planet Uranus, and the (not so recent) discovery of America. Sefer Haberit was also incredibly popular; it has been reprinted some thirty times, was translated into Yiddish and Ladino, and remains available today.

In a section on solar and lunar eclipses, Hurwitz recalled the transit of Venus in 1769. He described how Cook’s expedition had almost been in vain when some of their scientific instruments were stolen the night before the transit, and how, thanks to the team’s valiant efforts, the stolen instruments were returned. Here is the original text:

Text of Sefer Haberit in one.png

And I have twice witnessed a solar eclipse caused by the moon. The first was in the Hague in Holland, and the second in Vilna in Lita, the city of my birth. During my life there was also a transit of across the sun by the planet Venus, which passed in front of it as a tiny round black dot…

This transit [of 1769] became famous across the world before it had even occurred. In British universities they examined and calculated the orbits of the planets and discovered that at a specific time Venus will pass across the face of the sun. Several years prior, they published that this event would be visible at a specific time in one location and at another time in another location…So one year prior a number of wealthy adventurers left England and sailed for more than a year to reach distant shores. They reached the island of Tahiti in the Americas, together with their telescopes and equipment to see the transit under the best conditions…

On the day before the event they set up their equipment at a specific location to be ready for the transit. But overnight the locals stole all the equipment, and then denied having done so, making the entire trip almost fruitless. But after intense negotiations they returned it all, and the transit of Venus occurred at the exact time that had been predicted…

Cook eventually returned to England with his measurements, which together with those from several other observations from Lapland to California eventually allowed the Sun-Earth distance to be calculated. (Oh, and that bit about the equipment being stolen. It is mostly true. A quadrant went missing. Here is how Cook described what happened next in his journal: “… it was not long before we got information that one of the natives had taken it away and carried it to the Eastward...I met Mr Banks and Mr Green about 4 miles from the Fort returning with the Quadrant, this was about Sunset and we all got back to the Fort about 8 oClock.”)

What is of interest here is that Hurwitz did not inform his readers of the real reason that the transit was to be observed.  There is no mention of the way in which the transit of Venus could be used to determine the size of the solar system or the distance from the sun to the Earth, which were of course the real reasons for all the time and effort being spent in observing it.  Why did Hurwitz leave all this out, and suggest instead that the reason for sending Captain Cook all the way from London to Tahiti was to see if the predictions for the time of the transit were accurate?

The answer lies in the fact that Hurwitz was somewhat conflicted about his belief in the model suggested by Copernicus in which the Earth and all the planets revolve around a stationary sun.  Although in some places in Sefer Haberit he spoke highly of the Copernican model, Hurwitz ultimately sided with the Tychonic universe in which all the planets except the Earth revolve around the Sun, while the Sun orbits a stationary Earth, dragging the planets along with it. He did this for a number of scientific and theological reasons, including a belief that the Earth was the crowning glory of creation. “All of the planets were only created for the sake of this Earth, and everything was created for the sake of mankind on the Earth...even if the purpose of these other heavenly creations is not always clear to us.”Since the Earth was the reason for creation, it was only fitting that it lay at the center of the universe.

Hurwitz described the goal of Cook’s expedition to Tahiti as testing the predictions of the timing of the transit, when in fact its mission was far more important than that. But since Hurwitz ultimately rejected the Copernican model, he chose not to discuss the real reason for Cook’s expedition, namely to provide data that would allow the size of the Copernican solar system to be calculated.  Instead, Hurwitz described the mission as one to verify the times of the predicted transit, as a sort of test of the ability of astronomers to predict these kinds of events.  Although he did not reveal the real goals of the expedition, he noted that is was a great success, and that transit of Venus occurred precisely the times predicted. Which it did.

The range of solar parallax values derived from the 1769 transit, and thus the length of the astronomical unit, drew ever closer other values accepted today. ...a modern radar-based value for the astronomical unit is 92,955,000 miles.
And based on his analysis of the 1769 transit of Venus, Thomas Horsby wrote in 1771 that “... the mean distance of the Earth from the Sun will be 93,726,900 English miles.”
Eight-tenths of a percent difference. Absolutely remarkable.
— Teets, D. Transits of Venus and the Astronomical Unit. Mathematic Magazine 2003; 75 (5); 347.

2. Kochava Deshavit 1835

We have previously discussed the Jewish scientist extraordinaire Chaim Zelig Slonimski, For our new readers here is a recap.

Chaim Zelig Slonimski. Kochava DeShavit 1835.

Chaim Zelig Slonimski. Kochava DeShavit 1835.

To coincide with the appearance of Halley's Comet in 1835, a Hebrew book called Kokhava Deshavit (The Comet) was published in Vilna. It described where and when the comet would be visible with precise coordinates for the inhabitants of Bialystok, as well as an explanation of the nature of comets and their orbits. The author was the remarkable Hayyim Zelig Slonimski, (1810-1904), the founding editor of Hazefirah (The Dawn), a weekly Hebrew-language newspaper first published in Warsaw in 1862. He also wrote Mosdei Hokhmah (The Foundation of Wisdom), a work on algebra, and struck up a friendship with the famed German naturalist and explorer Alexander von Humboldt (1769–1859). Not content with all this, Slonimski invented a method to send two telegraphs simultaneously over one wire (which was a very big deal at the time,) and developed a calculating machine that he later presented to the Imperial Academy of Sciences in St. Petersburg. It was so successful that in 1845 the Russian minister of education made Slonimski an honorary citizen, a remarkable honor given the general oppression faced by the Jews at the time. So yes, Jewish scientist extraordinaire.

Writing in Kokhava Deshavit Slonimski explained why the transit was so important: “if [Venus] happens to pass in front of the sun and we can see it, that would be the time for astronomers to measure the angle it subtends in front of the sun (solar parallax), which is a fundamental and valuable [measure] for astronomy, as those who know these things understand. This is the reason that astronomers went to such lengths at that time to measure the moment of its [Venus’] conjunctions at various locations across the Earth. In 1769, when astronomers calculated that the transit would occur, they all prepared for this time in order to provide the most precise measurements…” [Small print: Slonimski here is absolutely correct. Solar parallax is an angular measurement that is one-half of the angular size of the Earth as seen from the sun. The reason the measurement is so important is that the distance to the sun is the radius of the Earth divided by the solar parallax.]

…Germany sent three astronomers to Domingo in the Americas and to East India, and England sent them to North America, Madras, and Tahiti. The Russian Empress Catherine sent people to follow astronomers from Germany and Sweden. They brought lots of equipment from London and Paris which they sent to the four corners of her empire…

They calculated the angle of parallax with great precision, but it was not quite accurate enough. They will get a better measurement at the next opportunity. This will occur in the Jewish year 5634 [1874] on the ninth of December, when Venus will again transit the sun at 2.18pm. The transit will last 4 hours and 9 minutes.

The reader can almost see the smile on Slonimski’s face as he shared the start time of the transit. In fact Slonimski viewed these kinds of calculations as one of the great triumphs of astronomy. When in 1846 astronomers discovered the planet Neptune, they did so on the basis of a series of calculations that suggested the existence of a planet to account for irregularities in the orbit of Uranus. And Slonimski was overjoyed, imbuing the moment with a religious patina:

The findings of this amazing discovery have struck every wise person with awe. Nothing like this in the history of humanity has ever occurred since God created man on the Earth. For can a person sit at home and use his human mind to calculate and then find a completely hidden celestial object thirty-six times as far away as the Sun is from the Earth? Yet indeed he can point to the sky and say “look, aim your telescopes there. That is where you will find another planet that orbits the Sun”…

3. Nivreshet Lenez Hahamah 1898

The third Hebrew book to discuss the measurement of astronomic distance is Nivreshet Lenez Hachama (The Chandelier of the Sunrise), published in Jerusalem in 1898. Its author was the geocentric Hayah David Spitzer. He rejected Copernicus and his heliocentric model, believing instead that the entire universe revolved around the Earth, because “everything, including the Sun, was created for the Earth and for Israel who dwell on it and keep the Torah.” Spitzer’s main interest was in determining the precise times of sunrise and sunset in halakhah, and he spent hours carefully measuring these times in and around Jerusalem.

Spitzer rejected all the calculations about the size of the solar system and the distance to the nearest stars that had been calculated using the observations of the transit of Venus, as well as estimates of the speed of light that had been made in the nineteenth century. He did so on both ‘scientific’ and religious grounds. For example, if as astronomers claimed, some stars were 24,000 light years away from Earth, their light could not have reached the Earth that had only existed for some 6,000 years. In addition, what purpose would there have been in creating such remote stars, whose light served no purpose for those on Earth? Finally, since the speed of light is not mentioned in the Talmud, the notion that light has a finite speed cannot be correct. Here is the original text.

Hayah David Spitzer, Nivreshet Lenez Hahamah(Jerusalem: Blumenthal, 1898). 35a.

Hayah David Spitzer, Nivreshet Lenez Hahamah(Jerusalem: Blumenthal, 1898). 35a.

We find various discussions in out Talmud about the size of the universe, and the distance to and the size of the stars. But we there is no mention at all about the idea that sunlight or light from the stars takes a finite time to reach us. If there was even the remote possibility that this was so our sages would certainly have discussed it in detail…

Spitzer claimed that anyone could perform a simple experiment that would refute the notion that light took a finite time to travel vast distances. If, during the day, the door to a house was suddenly closed, it should still be possible to see an image of the sun for some time since the light would take time to travel from the site of the now closed door across the room and into the eye of the observer. Similarly, 

if we open a closed door or window…we should not be able to see sunlight for some time, and we should be forced to sit in darkness as if the doors had not been opened. What can be said of this idiocy and stupidity, at which any person would laugh? Rather, as soon as a person opens his eyes he stops seeing nothing and when he opens his eyes at night he immediately sees all the stars, both those nearby that need sixteen years for their light to travel, and those far away whose light takes one hundred and twenty years to reach us.

Sptizer 34b.

Sptizer 34b.

Oy. Even when judged by the scientific standards of his own time, Spitzer’s work was astonishingly naive. To explain why he adopted this extreme (and extremely uninformed) position, you need to understand that Spitzer believed that the entire scientific process had but one goal in mind - to destroy the fundamentals of Jewish belief: “Their entire aim is to deny God’s Torah, to destroy religion, to confuse those who would disagree with them and to embarrass and belittle the sages of Israel.”


These three rabbinic authors had three quite different ways of approaching both the history of the transit of Venus and the measurement of distances that was deduced from it. Hurwitz was certainly inquisitive about all things scientific, but did not reveal the real goals of the expeditions to observe the transit, because they would raise further questions about the model of the solar system in which he believed- a model in which the Earth was the unmoving center. Slonimski informed his readers of the real goals of the observations and had no issues – religious or scientific - with accepting a universe in which the Earth was not the center. But for Spitzer, the enterprise of astronomy was a vast conspiracy to undermine Torah values. He therefore stretched to reject any science that the transit of Venus bequeathed to future generations.

Alexander was not just another conqueror in the ancient world. He severed that world from its past. He hellenized it, and at the same time he delivered a lethal blow to its traditions.
— G. W. Bowersock. The Invention of Time. The New York Review of Books. Nov 7, 2019, 29.

Humanity has been intrigued by the heavens for as long as recorded history. The answer Alexander the Great received from the Elders of the Negev was not based any mathematical principles or measurements of the planets or stars. It was based on a more important and more trustworthy source: the word of God. Over a millennia later, the Temple in Jerusalem was interpreted as a model of the solar system, with its gates representing the planets. That’s next time, on Talmudology.

[Partial repost from a here.]

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