Scientist

Simon Donaldson

Scientist — born 1957-08-20 in Cambridge.

Born
August 20, 1957, 12:00, Cambridge
Birth time
Rodden XBirth time unknown — chart uses noon as placeholder.
Simon Donaldson's natal chart wheelNatal chart showing 10 planets across the twelve zodiac signs.House 11House 22House 33House 44House 55House 66House 77House 88House 99House 1010House 1111House 1212Moon at 18°42' GeminiUranus at 8°33' LeoSun at 27°08' LeoPluto at 0°02' VirgoMars at 7°45' VirgoMercury at 23°12' VirgoVenus at 0°30' LibraJupiter at 2°29' LibraNeptune at 0°14' ScorpioSaturn at 7°44' Sagittarius

What an astrologer notices first

The striking Sun-Pluto conjunction in Leo stands out as the chart's most compelling feature. This aspect suggests a person of considerable influence and transformative power, capable of making a lasting impact in their field. For Simon Donaldson, it reflects his profound contributions to mathematics, marking him as a figure whose work not only challenges but also revolutionizes established paradigms. This conjunction is a testament to his ability to harness both personal charisma and intellectual depth in pursuit of groundbreaking achievements.

The reading

Simon Donaldson's chart is dominated by the dynamic interplay between his Sun in Leo and a powerful conjunction with Pluto, hinting at a magnetic presence capable of transformative achievements. The Sun's sextile to Neptune introduces a touch of creative vision that likely fuels his scientific pursuits, enhancing his ability to delve into complex realms with a flair that is anything but ordinary. This blend of charisma and depth is mirrored in his professional life, where his contributions to mathematics have reshaped understanding in his field.

Placement by placement

What each part of the chart shows

Sun in Leo

The Sun in Leo suggests an individual with a commanding presence and a natural inclination toward leadership. Positioned in the tenth house, this placement underscores a career marked by significant achievements and recognition. For Donaldson, this manifests in his groundbreaking work in mathematics, where his contributions have left a lasting impact.

Moon in Gemini

With the Moon in Gemini, Donaldson possesses a curious and adaptable mind, well-suited to the ever-evolving landscape of scientific inquiry. The placement in the eighth house hints at a deep interest in probing the mysteries of life, perhaps driving his passion for unraveling complex mathematical puzzles.

Mercury in Virgo

Mercury in Virgo reflects a meticulous and analytical approach to thinking, crucial for any scientist. Its position in the eleventh house suggests a strong connection to intellectual communities and collaborations, which likely play a role in his professional life, fostering innovation and shared discovery.

Venus in Libra

Venus in Libra in the eleventh house highlights Donaldson's affinity for harmonious relationships within his professional network. His ability to navigate and foster these connections may contribute to his success, providing a supportive environment for his intellectual endeavors.

Mars in Virgo

Mars in Virgo underscores a disciplined and precise approach to work, essential for Donaldson's achievements in mathematics. The tenth house placement suggests a relentless drive and ambition in his career, contributing to his status and accomplishments in the academic world.

Ascendant in Scorpio

Scorpio rising endows Donaldson with a penetrating intensity and a compelling presence. This ascendant suggests a person who approaches life with depth and tenacity, qualities that are mirrored in his persistent pursuit of excellence in his scientific career.

The pattern

How the chart maps to the life

Simon Donaldson's chart weaves together a portrait of a man whose contributions to mathematics are both profound and widely recognized. The conjunction of his Sun and Pluto in Leo hints at a transformative impact in his field, while the sextile with Neptune adds a visionary quality to his work. His Moon in Gemini, trine to Chiron, suggests an innovative mind constantly seeking new insights, a trait evidenced by his pioneering work in geometry. Mercury in Virgo, conjunct Venus and Jupiter in Libra, points to an analytical yet harmonious approach to his intellectual pursuits, fostering collaborations that have likely expanded the horizons of his research. The disciplined energy of Mars in Virgo, square Saturn, reflects the sustained effort and precision required for his groundbreaking contributions. Donaldson's Scorpio ascendant further emphasizes his ability to delve deeply into complex subjects, ensuring his legacy in the mathematical community. Notably, his Fields Medal win in 1986 serves as a testament to the powerful synergy of these placements, illustrating how his innate talents and relentless pursuit of knowledge have intersected to create a remarkable career.

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Same date

Also born on August 20

Public figures sharing the same calendar date as Simon — same Sun degree band, same dominant life path, same date signature.

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Full chart data

All planetary positions

  • Sun27°08' LeoH10
  • Moon18°42' GeminiH8
  • Mercury23°12' VirgoH11
  • Venus0°30' LibraH11
  • Mars7°45' VirgoH10
  • Jupiter2°29' LibraH11
  • Saturn7°44' SagittariusH2
  • Uranus8°33' LeoH9
  • Neptune0°14' ScorpioH12
  • Pluto0°02' VirgoH10
  • North Node14°27' ScorpioH1
  • Chiron14°07' AquariusH4
  • Lilith9°34' PiscesH4
  • South Node14°27' TaurusH7

Questions people ask

Simon's birth chart, the questions people ask

  • Scorpio Rising is the answer. The Rising is the mask the world sees first, and Scorpio manages that mask by revealing almost nothing voluntarily. It is not coldness — it is a deliberate withholding of information until the person in front of you has been assessed. Scorpio Risings walk into a room already reading everyone in it, and they do not show their hand until they have decided whether showing it is worth anything. What tends to happen is that people find them magnetic and unsettling in equal measure, because the attention is real but the access is controlled. With a Leo Sun underneath, there is genuine warmth and a desire to be seen — but the Rising decides when that gets switched on.

  • Mercury in Virgo is doing the heavy lifting here. Mercury governs how a person thinks — the actual machinery of analysis — and in Virgo, that machinery runs on decomposition. It takes a large problem and breaks it into the smallest possible components, then works through each one with close attention to error. Virgo Mercury does not tolerate imprecision in its own reasoning. It will rework a proof, a sentence, or an argument until the gap closes completely. Mars is also in Virgo, which means the drive and the method are running on the same fuel. When your energy and your thinking are both governed by the same sign, the focus becomes self-reinforcing. Most people with this combination cannot leave a problem half-finished.

  • Both, but they operate in different registers. The Leo Sun is competitive in the way Leo always is — it wants to produce work that is recognized as significant, and it measures itself against the best available standard. That is not aggression; it is a need for the output to matter at scale. Venus in Libra pulls in the opposite direction. Libra Venus routes satisfaction through exchange — it genuinely values the other person's thinking and wants the relationship to feel like a meeting of equals. Here's what tends to happen when these two placements share a chart: the person competes at the level of ideas while remaining genuinely collegial in the room. The rivalry is with the problem, not the colleague.

  • Mercury in Virgo controls how speech gets produced before it leaves the mouth. Virgo Mercury edits in real time — it is checking for accuracy, for the right qualifier, for the word that will not be misread. This is not shyness and it is not performance. It is a cognitive style that treats language as a precision instrument rather than an expressive one. Pair that with Scorpio Rising, which withholds information by default, and you get someone who speaks slowly, qualifies carefully, and does not fill silence with noise. The result in interviews reads as measured and slightly guarded. The honest version is that both placements are just doing what they do, and neither of them is built for loose talk.

  • Venus in Libra describes what he needs from a close relationship to feel like it is working. Libra Venus runs on reciprocity and balance — it is drawn to partners who can hold a real conversation, who take the relationship seriously as a structure, and who pull their weight in it. What Libra Venus cannot sustain is an uneven dynamic. It will work hard to restore equilibrium, sometimes past the point where that is useful. The Moon in Gemini adds another layer: emotional processing in Gemini happens through talking and thinking, not sitting with feeling. When something is wrong, the first move is to analyze it and discuss it. The combination produces someone who wants a relationship that functions like a good intellectual partnership.

  • Yes, and the friction is structural. Leo Sun wants the work to be grand — it is drawn to problems with large stakes and wants the output to carry significance that other people can recognize. Mercury and Mars in Virgo want to get every detail exactly right before anything goes out the door. Here's what tends to happen when these placements share a chart: the person sets ambitious targets and then spends an unusually long time closing the gap between the vision and the execution. The Leo Sun generates the appetite for scale. The Virgo placements refuse to release anything that does not meet a very high internal standard. The result is work that is both ambitious and technically rigorous, but the internal experience of producing it is rarely comfortable.

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Simon Donaldson · August 20, 1957 · What August 20 means