Rhonda Franklin is an American engineer and Professor of Electrical Engineering at @UMNews, where she gained her Master's in 1990 and PhD in 1995. She founded the @IEEEorg’s Project Connect, which promotes diversity in STEM.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/X1BQ6uRsFT

— RAS Women in STEM (@RAS_Women) October 31, 2018

Yvonne Darlene Cagle is an American medical doctor and trained astronaut. She became a doctor of medicine at @UW in 1985 and worked for the US Air Force, retiring with the rank of Colonel in 2008 before training as an astronaut @NASA.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/HuCGaZVUdC

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

Katherine Adebola Okikiolu is a British mathematician. She gained a degree in mathematics from @Cambridge_Uni in 1987 and a PhD from @UCLA in 1991. She has been an assistant professor at @Princeton , @MIT, and @UCSanDiego.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/9KvHadROTO

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

Jeanette Epps is an American aerospace engineer. She gained a PhD from @UofMaryland and worked as a Technical Intelligence Officer with the CIA for seven years, before training as an astronaut and aquanaut for @NASA_NEEMO. #STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/ZiusHvQHcx

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

Joan Higginbotham is an American engineer and astronaut. She gained a degree from the @SIUC in 1987, and masters from @FloridaTech. She became the third, and latest, black woman in space in 2006, after Mae Jemison and Stephanie Wilson.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/POSkI3n6UZ

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

Barbara Williams is an American astronomer and an associate professor at @UDelaware. She became the first black women to gain a PhD in astronomy @UofMaryland in 1981 and specialises in radio observations of compact groups of galaxies.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/EZ55gjzf5N

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

Claudia Joan Alexander was an American planetary scientist. She worked for @USGS and @NASAJPL, where she was the last project manager of @NASA's Galileo mission to Jupiter and project manager of NASA's role in the Rosetta mission.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/MSrCfyvbLW

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

Stephanie Wilson is an American engineer and astronaut. She gained degrees in engineering from @Harvard in 1988 and @UTAustin in 1992. She became the second black woman in space in 2006, and travelled to space again in 2007 and 2010. #STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/SwPOqLrOuw

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

Sharon McDougle is an American aerospace technician. She joined the Air Force in 1982 and is now a manager for the team that provides the Advanced Crew Escape Suit ensemble for astronaut training and space shuttle missions. #STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/dnnVlXM2ji

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

Mae Jemison is an American engineer, physician and astronaut. She trained as a medical doctor and then served in the Peace Corps from 1985 until 1987, when she joined @NASA. She became the first black woman in space in 1992. #STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/z4xKXFzYLB

— RAS Women in STEM (@RAS_Women) October 22, 2018

Mercedes Richards was a Jamaican astronomer. She gained a degree in physics from @UWImona in 1977 and a PhD in Astronomy and Astrophysics from @UofT. She became a Professor of Astronomy @UVA in 1999 and specialised in binary stars. #STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/MknScX2DQ7

— RAS Women in STEM (@RAS_Women) October 21, 2018

Irene Long is an American physician. She began working @NASA in 1982 and became director of Biomedical Operations at @NASAKennedy in 1994. She was the first woman to become chief medical officer at @NASAKennedy in 2000.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/fGQF7Y2oZY

— RAS Women in STEM (@RAS_Women) October 20, 2018

Patricia Suzanne Cowings is trained astronaut. She was an alternate for a @NASA space flight in 1979 but did not travel to space. She has since worked for @NASAAmes, looking at the physiology of astronauts and cures for motion sickness#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/U1AeR9fCjM

— RAS Women in STEM (@RAS_Women) October 19, 2018

Shirley Ann Jackson is an American physicist. She was the first black American woman to gain a PhD at @MIT and the second black American woman to gain a PhD in physics in the US, after Willie Hobbs Moore. She worked @Fermilab and @CERN#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/iFu0NlN54L

— RAS Women in STEM (@RAS_Women) October 18, 2018

Valerie Thomas is an American engineer and inventor. She began working as a data analyst for @NASA in 1964 and was involved in projects related to satellite technology, Halley's Comet, ozone research, and the Voyager spacecraft. #STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/mXBS7SQChk

— RAS Women in STEM (@RAS_Women) October 17, 2018

Christine Darden is an American mathematician, data analyst, and aeronautical engineer. She began working for @NASA_Langley in 1967, specialising in supersonic flight and sonic booms. She earned a PhD in engineering @GWtweets in 1983.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/j8Zr2EODNz

— RAS Women in STEM (@RAS_Women) October 16, 2018

Geraldine Darden is an American mathematician. She gained a degree from @_HamptonU in 1957 and a master’s degree from @Illinois_Alma in 1965. She worked as a teacher before gaining her PhD in mathematics from @SyracuseU in 1967. #STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/uAkI0UN3eo

— RAS Women in STEM (@RAS_Women) October 15, 2018

Dolores Richard Spikes was an American mathematician. She became the first black American woman to gain a PhD in mathematics from @LSU in 1971 and served as president of @UMESNews, from 1997 to 2001. #STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/UwEw7XjsyI

— RAS Women in STEM (@RAS_Women) October 14, 2018

Gloria Conyers Hewitt is an American mathematician. She gained a PhD in Mathematics from @UW in 1962. She then worked at @umontana, where she became the first black American woman to chair a mathematics department in the US in 1995.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/OBdRAtGHDD

— RAS Women in STEM (@RAS_Women) October 13, 2018

Jeanette Scissum is an American space scientist. She gained her PhD at @aamuedu and was the first black American mathematician to be hired by @NASA_Marshall in 1964, where she and developed techniques for forecasting the sunspot cycle.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/tj6qSECVgg

— RAS Women in STEM (@RAS_Women) October 12, 2018

Willie Hobbs Moore was an American physicist. She earned her PhD from @UMich in 1972, making her the first black woman to receive a PhD in Physics in the US. Moore went on to work for the Bendix Aerospace Systems Division, and @Ford.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/MkI2ApykKI

— RAS Women in STEM (@RAS_Women) October 11, 2018

Bettye Washington Greene was an American chemist. She gained her PhD in physical chemistry at @waynestate in 1965 and was the first black American woman to work as a chemist for @DowChemical, where she researched latex and polymers.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/exXCYcCPQq

— RAS Women in STEM (@RAS_Women) October 10, 2018

Annie Easley was an American computer scientist, mathematician, and rocket scientist. She joined the NACA in 1955, while it was still segregated, and before it became @NASA in 1958. She developed software for the Centaur rocket stage.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/EVGKVe8FEu

— RAS Women in STEM (@RAS_Women) October 9, 2018

Vivienne Malone-Mayes was an American mathematician. She was the fifth black American woman to gain a PhD in mathematics in American, which she gained from @UTAustin, and the first black American member of the faculty of @Baylor.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/8i0C52Fu56

— RAS Women in STEM (@RAS_Women) October 8, 2018

Iris Mack is an American mathematician. She was the second black woman to receive a PhD in applied mathematics from @Harvard in 1986. She worked on the Viking program @NASAJPL and was a semi-finalist for @NASA Astronaut Program in 1989#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/RmS5fUSpkX

— RAS Women in STEM (@RAS_Women) October 7, 2018

Gladys Mae West is an American mathematician who developed the mathematics needed for Global Positioning Systems (GPS). She became the second black woman ever to be employed by @NSWCDD in 1956, working on data-processing systems.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/UN2Ugpe6Js

— RAS Women in STEM (@RAS_Women) October 6, 2018

Thyrsa Anne Frazier Svager was an American mathematician and one of the first black American women to gain a PhD in mathematics, which she did @OhioState in 1965. She worked as a systems analyst at @NASA and for @MIT in the 1960s.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/kbPheq2t7b

— RAS Women in STEM (@RAS_Women) October 5, 2018

Melba Roy Mouton was an American mathematician and computer programmer. She began working for @NASA in 1959. She was head mathematician for Project Echo and became Assistant Chief at NASA's Trajectory and Geodynamics Division.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/64DmDNcBzL

— RAS Women in STEM (@RAS_Women) October 4, 2018

Gloria Gilmer was an American mathematician. She gained a degree in mathematics from @MorganStateU in 1949, and a PhD from @MarquetteU. She helped pioneer ethnomathematics, the study of the relationship between mathematics and culture.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/w7C6EH3ioM

— RAS Women in STEM (@RAS_Women) October 3, 2018

Louise Nixon Sutton was an American mathematician, and the first black American woman to gain a PhD in mathematics at @nyuniversity in 1962. She became Professor of Physical Sciences and Mathematics at Elizabeth City State University.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/H93u6uGwvT

— RAS Women in STEM (@RAS_Women) October 2, 2018

Alma Levant Hayden was an American chemist, and one of the first black American women to gain a scientist position at a science agency in Washington, D.C., working at @NIH in the 1950s, and later @US_FDA.#STEMlegends #WomenInSTEM #BlackHistoryMonth pic.twitter.com/i95PIyiEiI

— RAS Women in STEM (@RAS_Women) October 1, 2018