Dra. Julieta Fierro, "the Carl Sagan of Mexico", is a professor, Institute of Astronomy, Universidad Nacional Autonoma de Mexico (UNAM), and one of the world's foremost communicators of astronomy. Her graduate degree was in astronomy, and she teaches regularly at UNAM, and has carried out research on interstellar matter.

Georges-Achille van Biesbroeck (January 21, 1880 – February 23, 1974) was a Belgian-American astronomer. He worked at observatories in Belgium, Germany and the United States. He specialized in the observation of double stars, asteroids and comets. He is notable for his long career as an observational astronomer.