top of page

Science and Superstition, Johannes Kepler's Fight to Clear his Mother's Name




When we think of the famous astronomer and mathematician Johannes Kepler, we often remember his groundbreaking contributions to our understanding of the cosmos. However, there is another, lesser-known aspect of his life that is just as intriguing: his efforts to save his mother, Katharina Kepler, from being convicted and executed as a witch.


Johannes Kepler was born in Weil der Stadt, Germany, in 1571 to Heinrich and Katharina Kepler. His father, a mercenary, was often away from home, leaving Katharina to care for their children as a single parent. Despite the challenges of raising a family during a time of religious and political turmoil, Katharina did her best to support her children and provide for their needs. Johannes, in particular, showed a keen aptitude for learning and was enrolled in prestigious schools and universities, thanks to his mother's support.


Growing up, Johannes was heavily influenced by his parents, especially his mother. She was a strong, independent woman who had faced numerous hardships throughout her life, including surviving the death of her husband and raising their children alone. Her resilience and determination left a deep impact on Johannes, shaping his character and work ethic as he embarked on his scientific journey.

Meanwhile, Germany in the early 17th century was a place of great uncertainty and fear. Climate change, resulting in the Little Ice Age, led to crop failures and widespread famine. In a desperate search for answers, people turned to superstition and witchcraft, seeking scapegoats for their misfortunes. This climate of fear made it easy for women like Katharina Kepler to be targeted as witches, particularly because she was an older woman who relied on herbal medicine to help her community.




Kepler's scientific journey was filled with challenges and triumphs. Despite facing numerous obstacles, including financial difficulties and personal tragedies, he persevered and made groundbreaking discoveries in the fields of astronomy, mathematics, and physics. Among his most significant achievements are his three laws of planetary motion, which laid the groundwork for our modern understanding of the solar system. Kepler's personal life, however, was not without its share of hardships. He lost his first wife and several children to illness, and he struggled to support his family while pursuing his scientific research.




As Johannes Kepler's career progressed, his mother Katharina found herself at the center of a witchcraft accusation. The charges against her stemmed from a dispute with a former friend, Ursula Reinbold, who claimed that Katharina had poisoned her and caused her chronic pain. This accusation was further fueled by Johannes' book "The Dream," in which he explored the idea of a fantastical lunar voyage. The book was interpreted by some as evidence of the Kepler family's involvement in witchcraft.




Somnium, or Dream, tells the story of a young boy's trip to the moon. Much of the story seems to be a thinly veiled autobiography. However, the Somnium was also packed with notes on the scientific ramifications of Kepler's discoveries. The accuracy of his prediction of what a lunar journey would be like reveals what remarkable physical intuition he had.

The Kepler family was shocked by the accusations against Katharina. Her children knew their mother as a hardworking, pious woman who had always supported them. Christoph, one of Katharina's sons, was particularly affected by the situation. He was horrified by the thought of his mother's trial taking place in their hometown of Leonberg, fearing the shame it would bring upon the family. He wrote to Duke John Frederick of Württemberg, requesting that Katharina's trial be conducted elsewhere. The Duke's Chancellor agreed, and Katharina was transferred to Guglingen, a small town about 60 kilometers away from Leonberg.




Throughout the ordeal, Johannes Kepler struggled with feelings of guilt and responsibility. He was acutely aware of the potential damage his own unorthodox views and interests could have on his mother's case. Yet, he also felt compelled to defend her and clear her name. As the trial unfolded, Johannes found himself growing closer to his mother and gaining a deeper understanding of the world she lived in.


Johannes Kepler's legal defense for his mother was a masterful display of his rhetorical and argumentative skills. He meticulously dissected the prosecution's case, attacking the credibility of the witnesses and the procedures used to gather evidence. He pointed out that many of the witnesses had personal grudges against his mother or were relying on hearsay, making their testimonies unreliable.

In his defense, Johannes Kepler singled out Ursula Reinbold, who had accused his mother of poisoning her. He argued that Reinbold had a personal vendetta against Katharina and that her own husband had been involved in witchcraft, further discrediting her testimony. Through his careful examination of the evidence, Kepler aimed to expose the true motives behind the accusations against his mother and protect her from an unjust punishment.


Ultimately, Johannes Kepler's tireless efforts paid off. His legal defense, combined with his relentless pursuit of the truth, helped secure his mother's release from imprisonment. Although her reputation had been tarnished by the trial, Katharina Kepler was exonerated, thanks in large part to her son's unwavering support.


The witchcraft trial of Katharina Kepler left a profound impact on Johannes Kepler, both personally and professionally. The ordeal forced him to confront the prejudices and superstitions of his time and fueled his determination to continue his scientific work. Despite the many obstacles he faced, including financial struggles and personal tragedies, Kepler remained committed to his research, making groundbreaking discoveries that revolutionized our understanding of the cosmos.



In the aftermath of his mother's trial, Johannes Kepler's work continued to be deeply influenced by the events he and his family had endured. He became more determined than ever to reveal the mysteries of the universe through his scientific pursuits, inspired by the idea that a greater understanding of the cosmos could help dispel the ignorance and fear that had led to his mother's persecution.


Johannes Kepler's achievements in astronomy and mathematics, including his laws of planetary motion and his work on optics, would go on to shape the course of scientific history. His tenacious spirit and dedication to truth in the face of adversity not only contributed to his own success but also left a lasting impact on the generations of scientists who followed in his footsteps.


In conclusion, the witchcraft trial of Katharina Kepler serves as a powerful reminder of the devastating consequences of superstition and fear. As we reflect on Johannes Kepler's life and work, it is essential to recognize the role that his mother's ordeal played in shaping his worldview and inspiring his pursuit of knowledge. Through his scientific discoveries and unwavering dedication to the truth, Johannes Kepler helped to pave the way for a more rational and enlightened understanding of the universe, in stark contrast to the dark and superstitious beliefs that had nearly cost his mother her life.

Comments


bottom of page