Debra Ann Fischer is an American astronomer who is the Eugene Higgins professor of astronomy at Yale University researching detection and characterization of exoplanets.

In two papers with Jeff Valenti,[6] she quantified a correlation between the chemical composition of host stars and the formation of orbiting gas giant planets.

[10] In 2015, she organized an international workshop on Extreme Precision Radial Velocities at Yale University[11] and led the conference proceedings paper with 55 co-authors.

[12] With the Oxford Zooniverse team, Fischer co-founded the Planet Hunters Citizen Science project.

[18][19][20][21][22] Fischer and colleagues[23][24][25] have also helped to advance statistical and machine learning methods to improve data analysis and sensitivity to low mass planets.