Born on This Day

Mary Jackson At Work

Mary Jackson

1921 - 2005

NASA's first Black female engineer who focused on the airflow around aircraft.

Hugh Hefner

Hugh Hefner

1926 - 2017

Founder of Playboy magazine, which helped shape the sexual revolution of the 1960s.

The 2024 Met Gala Celebrating "Sleeping Beauties: Reawakening Fashion" - Red Carpet

Lil Nas X

1999 -

Singer-songwriter known for 2019's crossover country-rap hit "Old Town Road."

1965

APR

9

The Houston Astrodome opens, the world's first indoor, air-conditioned domed sports stadium. A year later, the Dome made history again when it showcased the first installation of Astroturf.

Timeline

Also on This Day in History

Discover more of the major events, famous births, notable deaths and everything else history-making that happened on April 9th

History Every Day

Sign Up for "This Day in History"

Uncover fascinating moments from the past every day! Learn something new with key events in history, from the American Revolution to pop culture, crime and more.

By submitting your information, you agree to receive emails from HISTORY and A+E Global Media. You can opt out at any time. You must be 16 years or older and a resident of the United States.