Zulema L'Astròloga was a Moorish astronomer and noblewoman living in what is now Palma, Majorca in 1229. She is said to have watched the stars from the medieval tower of Sant Elm on the coast of Majorca. #STEMlegends #WomenInSTEM pic.twitter.com/BhQEfXwG8l

— Royal Astronomical Society (@RoyalAstroSoc) March 8, 2018

Mariam Al-Ijliya Al-astrulabi was an astronomer who lived in Aleppo, now part of northern Syria, in about 950. She is known for making astrolabes, devices used by astronomers and navigators to determine their latitude using the stars. #STEMlegends #WomenInSTEM pic.twitter.com/vH8GQtUnVY

— Royal Astronomical Society (@RoyalAstroSoc) March 8, 2018

Fatima al-Fihri was an Arab Muslim woman who is known for founding the first university in the world in 859. This was the University of Al Quaraouiyine located in Morocco in North Africa. She also founded one of the oldest libraries in the world. #STEMlegends #WomenInSTEM pic.twitter.com/rhVTJ6qxwB

— Royal Astronomical Society (@RoyalAstroSoc) March 8, 2018

Hypatia wrote and taught mathematics and astronomy. She may have edited Euclid's Elements and Ptolemy's Almagest in c. 400. She was a pagan who lived in Alexandria, Egypt, and was murdered by Christian monks, becoming a "martyr for philosophy". #STEMlegends #WomenInSTEM pic.twitter.com/FI3RFqZnzE

— Royal Astronomical Society (@RoyalAstroSoc) March 8, 2018

Mary the Jewess, also known as Mary the Prophetess, was an Egyptian alchemist, an early type of chemist, who lived in c 200. She conducted scientific experiments, invented different types of apparatus, and was sometimes known as the "Daughter of Plato". #STEMlegends #WomenInSTEM pic.twitter.com/Zn3nXEM34z

— Royal Astronomical Society (@RoyalAstroSoc) March 8, 2018

Ban Zhao was a historian, librarian, and astronomer. She completed Hanshu the history of the Western Han in 111, including female genealogy for the first time. She suggested women be well-educated and promoted Biographies of Exemplary Women by Liu Xiang. #STEMlegends #WomenInSTEM pic.twitter.com/AMDDhLafPK

— Royal Astronomical Society (@RoyalAstroSoc) March 8, 2018

Aglaonike was the first known female astronomer in Ancient Greece. It's thought that she could predict lunar eclipses in about 150 BCE, and so she was sometimes referred as a sorcerer. A Greek proverb states: “the moon obeys Aglaonike". #STEMlegends #WomenInSTEM pic.twitter.com/EMJIFtPKzb

— Royal Astronomical Society (@RoyalAstroSoc) March 8, 2018

Cleopatra is a pseudonym for a Greek Egyptian woman from 250 BCE whose real name is lost. She published extensive records of her chemical experiments, including drawings of apparatus, but much of her work was destroyed by the 4th century. #STEMlegends #WomenInSTEM pic.twitter.com/aUhS1V2Kqk

— Royal Astronomical Society (@RoyalAstroSoc) March 8, 2018

Theano of Crotone lived in about 550 BCE. She applied Pythagorean mathematics to the role of women in society. One of her books may contain the doctrine of the golden mean, which is usually associated with Aristotle, who was born over a century later. #STEMlegends #WomenInSTEM pic.twitter.com/q0mmiM2vpa

— Royal Astronomical Society (@RoyalAstroSoc) March 8, 2018

Tapputi-Belatekallim was the first person in history to have recorded chemical experiments. She is thought of as the first chemist and was mentioned in a tablet from Babylonian Mesopotamia. This was written in a Sumerian language and dated to c 1200 BCE. #STEMlegends #WomenInSTEM pic.twitter.com/u98AlphAN4

— Royal Astronomical Society (@RoyalAstroSoc) March 8, 2018

Enheduanna was a high-priestess and princess who lived in the Sumerian city-state of Ur, now part of Iraq. She was appointed Priestess of the Moon Goddess in about 2354 BCE, which required making accurate mathematical and astronomical predictions. #STEMlegends #WomenInSTEM pic.twitter.com/ji9IBPHahA

— Royal Astronomical Society (@RoyalAstroSoc) March 8, 2018