Sophie Brahe, Horticulturalist, Astronomer, Chemist, Genealogist and Sister to Tycho

Sophie Brahe, linocut 11" x 14" by Ele Willoughby, 2025

Born in either 1556 or 1559,  the 12th child (9 survived infancy) of Otte Brahe, advisor to the Danish king Frederick II, and Beate Bille Brahe, leader of Queen Sophie’s royal household, in Knudstrup Castle, Sophie Brahe was a horticulturalist, astronomer, chemist, and genealogist. At least a decade her senior and adopted and raised by his uncle Jørgen Thygesen Brahe, Sophie did not grow up with brother, the famous astronomer Tycho but the two became close when she reached adolescence. They found they were alike, sharing a determination to pursue science despite their family’s attitude this was an unsuitable activity for an aristocrat. Eventually they also shared a determination to each marry for love without regard for financial concerns or familial approval. They married a commoner and penniless noble respectively. 

Sophie married Otto Thott in 1579 and they two had a son, Tage Thott in 1580, but Otto died in 1588. As a widow, Sophie was responsible for maintaining and running the estate (now known as Trolleholm Castle in Eriksholme) until her son came of age. She studied chemistry, medicine and horticulture, growing medicinal plants and an exceptional garden. Following the theories of Paracelsus, she produced medicines to treat the poor, but as a woman, she could not formally study medicine.  

She became a regular visitor to her brother’s astronomical and alchemical laboratory, first at Herrevad Abbey and then later at Uranienborg, on the island of Hven. Tycho trained her in horticulture and chemistry but initially discouraged astronomy, but she pursued it on her own. She taught herself with textbooks in German and texts she had translated at her own expense from Latin. Even if he initially thought she might have the skills and education to pursue astronomy, he realized she could help him with his observations. With time he realized she had the skills she needed, to the point that he eventually, when he was often absent from 1588 to 1597, he started to delegate his duties to her, getting her to calculate the astrological charts which were the bread and butter of Renaissance astronomers. 

Specifically she made observations for Tycho on 11 November 1572, which led to the discovery of the supernova that is now called SN 1572, as well as a lunar eclipse in 1573 while still a girl. Tycho published De nova stella, or On the New Star about the supernova; the stars in my portrait are based on De nova stella and SN 1572 is the large star above Sophie’s head. The discovery of supernova was important to the ongoing revolution in astronomy as an observable change in the sky seemed counter to the prevailing geocentric model of the universe. Sophie was instrumental to Tycho’s meticulous observations of planetary orbits. Tycho developed instrumentation that allowed the most precision observations ever made prior to the invention of the telescope; Sophie, along with some other assistants, used these to make measurements. The incredible dataset proved invaluable to Kepler and lead to his laws of planetary motion, an important precursor to Newton’s law of universal gravitation. 

While at Uranienborg, she met Tycho’s friend, the alchemist Erik Lange. Lange's sister was married to another Brahe brother, so they had a family connection as well. Tycho trusted Erik to the extent that he made him the executor of his children's estate. Sophie returned to visit Erik over a dozen times and the two became engaged in 1590. Lange’s passion for alchemy had bankrupted him; he was obsessed with trying to produce gold from base metals. Sophie stood by him and financially supported his efforts after he used up his own fortune. Their wedding was delayed for years when Lange had to flee to Germany to avoid his creditors. The 600-line epic poem “Urani Titani” was published in 1594, as the love letters between Sophie as Urania, the muse of astronomy and Erik as a titan, studying alchemy abroad, written from Sophie’s point of view. The printer thought she was the author, but Tycho later claimed it. It seems likely he was either author, or at minimum translator and interpreter of Sophie’s thoughts, as Sophie was not fluent in Latin and Tycho was more likely to have known of its unusual poetic form. The poem denounces the futile search for the philosophers’ stone and promotes instead allegiance to Phoebus, god of healing. This shows the closeness of the two siblings, his respect for her as an astronomer, and that they likely both doubted that alchemy could produce gold. Nonetheless, Sophie was devoted to Erik and supported his research. 

She was able to visit Lange in Hamburg in 1599 but the two were not able to wed until 1602 in Eckernförde, where the couple lived in extreme poverty. Sophie complained to her sister that she had to wear stockings with holes in them to her own wedding and the groom needed to return his wedding clothes to the pawn broker after the wedding. She also complained of the family’s objections to her pursuit of science and their failure to pay money she was owed. She was often allow as he fled due to his debts. Even jewellery and clothes her sisters gave her out of pity were hawked to support his alchemical research. Erik had moved to Prague by 1608, where he died in 1613.

After Erik’s death, she regained enough wealth to fund repairs to the church at Ivetofta near where Frederick II had previously granted her the nearby manor of Årup. She nonetheless moved to Zealand and settled in Helsingør in 1616 where he son Tyge Thott had become a State Councillor. There she pursued her studies of horticulture and healing plants, teaching her servant all she knew of botany and healing. Despite any disdain she felt about the social norms of the aristocracy, she produced a genealogy of the Brahe family in 1600 and by 1626 she published a 900 page genealogy of 60 Danish noble families, still considered a major source for the history Danish nobility. Even in her 80s she was receiving visitors who came to see her famous gardens. She died in 1643 and is buried in the village of Torrlösa in the Thott family chapel, which is now part of Sweden.

References

Alenius, Marianne, The Honey-Sweet Delicacies of the Muses,  The History of Nordic Women's Literature,  July 27, 2011

Murray, Caroline, Sister of the more famous Tycho, Professor Hedgehog’s Journal,  September 10, 2018

Neill, Crystal, Sophie Brahe: Tycho’s Urania, on Before Newton: Explorations of pre-modern science, medicine and technology blog, accessed January, 2025

Sophie Brahe, Wikipedia, accessed January, 2025.

Tycho Brahe, Wikipedia, accessed January, 2025.

Wentrup, Curt. Chemistry, Medicine and Gold-Making: Tycho Brahe, Helwig Dieterich, Otto Tachenius, and Johan Glauber, Chem Plus Chem, Volume 88, Issue 1, 24 November 2022 https://doi.org/10.1002/cplu.202200289

Sophie Ottesdatter Brahe, www.skbl.se/sv/artikel/SophieBrahe, Svenskt kvinnobiografiskt lexikon (article by Sara Griberg), retrieved 2025-01-07.

Hoyrup, Else. Sophie Brahe, on Grandma Got STEM blog, July 22, 2013, accessed January, 2025.

Rönneus, Maria Yrsa, Urania Titani: Sofie Brahe, guest post on Samantha Wilcoxson Blog, March 29, 2024, accessed January 2025.

Io, myth and moon

In this three colour (2 screen) screenprint, I combined Io, both the nympth (in cow-form) of Ancient Greek myth, and Io the large, volcanous moon of Jupiter. I'm interested in exploring the role of myth and imagination in science, and specifically here, how astronomical naming has been traditionally based on mythology. To make this screenprint, I combined my pencil drawings of cow/nymph Io and cloud with a NASA photograph of Io, which I manipulated. The screenprint is one of an edition of 10, printed in yellow (with a hint of lime), magenta and purple, on white paper, 28 cm (11 inches) square.

The story of Io is a funny one; she is one of many nymphs who caught the roving eye of notorious womanizer Zeus. As told by Ovid, in 'Metamorphoses', Io rejected Zeus' nighttime advances until the oracles lead her father to drive her into the fields. There, Zeus covered her with clouds to try and hide her from his justly jealous wife Hera, who nonetheless decuded there was something suspicious going on. Zeus then upped the ante and turned himself into a cloud and Io into a beautiful, white heifer. Hera, used to such nonsense, was not fooled and demanded the white heifer as a gift, which Zeus could not refuse. Needless to say, Hera kept this cow far from her unfaithful spouse. So, I made Io a lovely beribboned, heifer with garlands of flowers, resting on a fluffy (if lascivious) cloud.

The story goes on with more shenanigans, including Hera sending a gadfly to harass poor Io, which apparently has something (etymologically at least) to do with the oestrous cycle... but I didn't want to tell the revenge part of the tale, and no one wants to think about menses, though a relentless, vengeful, stinging gadfly does make some sense to me. Anyhow...



Io, the Jovian satellite - or moon, is the innermost of the four Galilean moons which Galileo first observed and identified (January 8, 1610 ) in orbit around Jupiter.* Galileo knew the importance of a good patron and he named them the 'Medician stars'. Io and her sister Jovian moons were important to the history of science. Their observation made it clear to Galileo that it was not possible that everything circled the earth if these moons circle Jupiter and thus, Copernicus must be right. We now know that this lovely moon is the most geologically active place in our solar system, with its more than 400 volcanoes fueled by tidal heating, as it is violently pulled in multiple directions by the strong gravity of Jupiter and the other moons. It has been beautifully photographed by a series of satelittes sent from Earth.

The Mad Scientists of Etsy challenge for this month is 'metamorphosis'. I thought I would make something related to science but with a less expected connection to the theme of 'metamorphosis'. Rather than natural, biological metamorphosis**, this print brings the mythological, metamorphosed Io (of Ovid's 'Metamorphoses') and the moon Io unexpectedly together.

*The IAU Gazetteer of Planetary Nomenclature points out that Simon Marius may even have observed Io days prior, but he neither published nor necessarily realized what he saw. Nonetheless, he named the Jovian moons. (He believed in Tycho Brahe's system, which was mid-way between helio- and geo-centric, with planets circling the sun, which in turn circles the Earth. At the risk of putting a footnote on my footnote, I'll point out that this in not as illogical as it sounds, because Tycho was an excellent experimentalist and couldn't justify a heliocentric model with his data... because he couldn't observe stellar parallax. So, he was wrong, not because he avoided new ideas, but because he was conscientious and the data for parallax was not acheivable with the technology of the time. Go team Tycho! Never underestimate an honest experimentalist.).

**Butterflies may be the new pirates, but I just don't like larvae.