CAPE CANAVERAL, Fla. (AP) — NASA’s first female astronaut candidate, pilot Jerrie Cobb, has died.

Cobb died in Florida at age 88 last month. News of her death came Thursday from journalist Miles O’Brien, serving as a family spokesman.

READ MORE: Former 737 Max Chief Technical Pilot Enters Innocent Plea To Charge He Deceived The FAA

In 1961, Cobb became the first woman to pass astronaut testing. Altogether, 13 women passed the arduous physical testing and became known as the Mercury 13. But NASA already had its Mercury 7 astronauts, all test pilots and men.

READ MORE: Arlington High School Lockdown Lifted After Student Found With Airsoft Gun

None of the Mercury 13 ever reached space.

Cobb served for decades as a humanitarian aid pilot in the Amazon jungle. She emerged in 1998 to make another pitch for space, as NASA prepared to launch John Glenn on shuttle Discovery at age 77. Cobb argued unsuccessfully that the research should include an older woman.

MORE NEWS: Students At North Texas High School Stage Walkout In Protest Of Alleged Student Sexual Assault