We are saddened by the passing of astronaut Mary Cleave. In addition to her two spaceflights, she was also the first woman to oversee NASA's Science Mission Directorate.

Today, we celebrate her 76 years of life and accomplishments: go.nasa.gov/3RnsnJA

I’m sad we’ve lost trailblazer Dr. Mary Cleave, shuttle astronaut, veteran of two spaceflights, and first woman to lead the Science Mission Directorate as AA. Mary was a force of nature with a passion for science, exploration, and caring for our home planet. She will be missed.

At the Canadian Embassy with the #artemis2 crew. What a great evening eh!

At NASA's Kennedy Space Center with the #Crew 6 NASA Social! Great time !

Thank you Senator Brian Schatz, Sen. Lisa Murkowski, Senator Cortez Masto, and Rep. Betty McCollum for your support for NASA and its mission to explore space. Let's continue to inspire the next generation of scientists and astronauts!

WATCH IT LIVE: Today, I’ll be welcoming members of the U.S. Congress as they speak with Nicole Mann during a video call from the International International Space Station. Tune in starting at 12:30 p.m. EST: nasa.gov/live

Great group at the NASA Social! Go Crew 5!

Highlight of my day: talking with an awesome group at the #Artemis #NASASocial , sharing the excitement of the Artemis 1 launch Monday morning. Go Artemis!

In honor of #TeacherAppreciationWeek , I want to #ThankATeacher who really helped set me on my course: Mr. Sverdrup, my pre-calculus teacher in high school. Thanks for instilling the joy for math in me!

Visiting the Space Telescope Institute and the NASA Webb Telescope team. An amazing afternoon with an amazing team! (Got to see a Webb pic no one else has…yet.😁)

Thank you to @ltgovofco Dianne Primavera for visiting @nasa at #37space today! Every state including Colorado has a hand in making our missions possible on behalf of the American people.

Just wanted to share another pic I took at roll out last night. So great to see the team’s hard work come to fruition. Go NASA Artemis !

Hard down on the pad. Go NASA Artemis ! Can’t wait for launch. What an amazing rocket !

Amazing pic of an American icon NASA's Kennedy Space Center last night after rollout. It never gets old!

Tons of energy last night NASA's Kennedy Space Center as NASA Artemis 1 rolled to the pad for wet dress rehearsal.

Congrats to the 3 newest members of the Astronaut Hall of Fame: Mike LA, Pam Melroy and Scott Kelly. Way to go!

Great news for our human exploration team! We are extremely fortunate to have two distinguished leaders - Kathy Lueders and Jim Free - at the helm of NASA’s human spaceflight programs.

💫 “In many ways, NASA is not a job. It’s a way of life.”

After more than 40 years of service, our Chief Scientist Jim Green announces he will retire in 2022. Learn about his contributions to exploration and our understanding of the solar system: go.nasa.gov/3lsmeuk