Maria Clara Eimmart was a German astronomer who made hundreds of astronomical drawings and paintings in the late 1600s. These included depictions of phases of the Moon and Venus, the Moons of Jupiter, and the rings of Saturn. #STEMlegends #WomenInSTEM pic.twitter.com/jlAPoDYBWz

— RAS Women in STEM (@RAS_Women) April 30, 2018

Jeanne Dumée was a French astronomer who began training in astronomy after becoming a widow at 17. Dumée wrote Discourse on the Opinion of Copernicus in c 1680, where she showed that the Sun cannot be orbiting the Earth. #STEMlegends #WomenInSTEM pic.twitter.com/jF8SUb9u4v

— RAS Women in STEM (@RAS_Women) April 29, 2018

Maria Margarethe Kirch was a German astronomer who produced calendars and almanacs in about 1700. She was the first woman to discover a comet, although it was named after her husband Gottfried. #STEMlegends #WomenInSTEM pic.twitter.com/eEmEA1HD0D

— RAS Women in STEM (@RAS_Women) April 28, 2018

Elisabetha Koopman Hevelius was a Polish astronomer. She was married to 52-year-old Johannes Hevelius in 1663, when she was just 16. They worked together, and in 1690 they jointly published Prodromus Astronomiae, a catalogue of over 1500 stars. #STEMlegends #WomenInSTEM pic.twitter.com/CbLVKFqMjx

— RAS Women in STEM (@RAS_Women) April 27, 2018

Elena Cornaro Piscopia was an Italian mathematician who became the first known woman to receive a PhD in the world. She did this at the @UniPadova in 1678. She went on to teach mathematics at @UniPadova and devoted the last years of her life to charity. #STEMlegends #WomenInSTEM pic.twitter.com/Ueu2WyUrDB

— RAS Women in STEM (@RAS_Women) April 26, 2018

Marie Crous was a French mathematician who wrote and taught mathematics in about 1640. She is known for introducing the decimal system to France, although she was not acknowledged at the time. #STEMlegends #WomenInSTEM pic.twitter.com/OcjMCEPnQg

— RAS Women in STEM (@RAS_Women) April 25, 2018

Marguerite de la Sablière was a French astronomer and mathematician. She was mocked by critics, who suggested that she was ruining her complexion by observing Jupiter. She was defended by Charles Perrault, who invented the modern fairy tale genre. #STEMlegends #WomenInSTEM pic.twitter.com/zVT5bhLmSc

— RAS Women in STEM (@RAS_Women) April 24, 2018

Maria Cunitz was a German astronomer who published Urania propitia, which contained one of the first descriptions of the scientific method, in 1650. Due to her gender, she had to correspond with other scientists via her husband. #STEMlegends #WomenInSTEM pic.twitter.com/10rfe59RRi

— RAS Women in STEM (@RAS_Women) April 23, 2018

Cunitz was described as "so deeply engaged in astronomical speculation that she neglected her household" 50 years after her death. She is now considered one of the most notable astronomers of the modern era and has a minor planet named after her.

— RAS Women in STEM (@RAS_Women) April 23, 2018

Margaret Cavendish was an English philosopher. She wrote The Blazing World, one of the earliest examples of science fiction, in c. 1650. She anticipated the central views of Thomas Hobbes and David Hume, and suggested that matter is capable of thought. #STEMlegends #WomenInSTEM pic.twitter.com/onwkThF6XI

— Royal Astronomical Society (@RoyalAstroSoc) April 22, 2018

Sophia Brahe was a Danish astronomer who also studied horticulture, chemistry, and medicine in about 1600. She is best known for working with her brother Tycho, whose observations led Johannes Kepler to show how planets orbit the Sun. #STEMlegends #WomenInSTEM pic.twitter.com/2hCa658kON

— Royal Astronomical Society (@RoyalAstroSoc) April 21, 2018