Mars in Marie Curie’s natal chart is the ruler of Scorpio and thus the ruler of the Sun. To have the planetary ruler of a sign within its own sign (as it is in Marie Curie’s chart) invariably adds strength to that sign. 

The ruler of the Sun is always important in a chart because the condition of the ruler shows how much power the Sun has to achieve it’s goals. Scorpio is arguably the toughest and most resilient of all the zodiac signs. Mars in Scorpio is very strong in Marie Curie’s chart and plays a very important role because it not only rules the Sun, but also the Midheaven, Venus and Saturn. 

Mars represents how we get things done as well as our assertive and aggressive urge. Having Mars in Scorpio ruling this stellium in her chart brought an incredibly intense, magnetic, focused, and passionate energy to Marie Curie’s life.  She would have felt an incredible drive to meet her goals at all costs (especially since Mars is in the anaretic degree point) .

Besides ruling the 11th house of friends in her chart, Mars also rules the 4th house of home and family(because Mars rules the sign Aries) This ties parents, home, roots and early environment intricately to Marie Curie’s life purpose.