What does it take to turn rejection into rocket fuel? When José Hernández finally launched into space aboard Space Shuttle Discovery, he didn’t just achieve a dream, he returned with a life-changing view of Earth and a renewed mission on it. Orbiting at 17,500 mph during the STS-128 mission, he saw no borders, only one planet we all share. Long before spaceflight, José helped pioneer digital mammography technology that transformed early breast cancer detection, led materials research at NASA, and contributed to the Columbia accident investigation. His career spans aquanaut moon mission simulations, nuclear security work with Russia, and mentoring students in satellite design through international STEM outreach In this conversation, José reflects on the science, the setbacks, and the view from space that transformed his mission on Earth.
Chapters:
00:00 - Rejected by NASA 11 Times
01:30 - Meet José Hernández
02:45 - Seeing Earth From Space
05:15 - First Time in Zero Gravity
07:00 - Space Made Me an Environmentalist
09:20 - From Farmworker to Astronaut
12:00 - My Dad’s Advice for Success
14:15 - How I Handled Rejection
17:30 - Living Underwater as an Aquanaut
20:05 - Returning to Gravity
22:00 - Inventing Life-Saving Tech
25:00 - Detecting Cancer With Physics
28:10 - Building My Aerospace Company
30:00 - Becoming a Winemaker
32:20 - Inspiring Future Scientists
34:00 - A Movie About My Life
37:15 - Antarctica With Captain Kirk
39:00 - Advice for Young Dreamers
41:00 - What’s Next for José
The Big Question: • The Big Question
José M. Hernández is a former NASA astronaut, engineer, inventor, author, and STEM advocate whose journey from migrant farmworker to space traveler exemplifies the power of perseverance. Selected by NASA in 2004, he flew aboard Space Shuttle Discovery in 2009 on mission STS-128 to the International Space Station, where he served as flight engineer and principal robotic arm operator. Before his selection, he led materials research at NASA’s Johnson Space Center and contributed to the Columbia accident investigation. Earlier in his career at Lawrence Livermore National Laboratory, he co-developed the first full-field digital mammography system—pioneering computer-aided cancer detection—and worked on space-based X-ray laser development and international nuclear security programs with the U.S. Department of Energy.
Following his spaceflight, José served at NASA Headquarters shaping space policy and later founded Tierra Luna Engineering, where he continues work in aerospace consulting, renewable energy, and international STEM outreach. His recent efforts include mentoring students in Mexico to launch the country’s first university-built satellite. In 2023, his life story inspired the Amazon Prime biopic A Million Miles Away, based on his memoir Reaching for the Stars. A recipient of numerous national awards and honorary doctorates, José continues to champion science education and equitable access to STEM opportunities worldwide.
Talia Sepersky has been with the Charles Hayden Planetarium at the Museum of Science in Boston for 13 years and her love of talking to people about space has yet to waver, including in person under the planetarium dome, online on the Museum’s social channels, and in your inboxes with the Museum’s weekly space newsletter “Spacing Out”.
Among the world's largest science centers, the Museum of Science engages millions of people each year to the wonders of science and technology through interactive exhibitions, digital programs, giant screen productions, and preK – 12 EiE® STEM curricula through the William and Charlotte Bloomberg Science Education Center. Established in 1830, the Museum is home to such iconic experiences as the Theater of Electricity, the Charles Hayden Planetarium, and the Mugar Omni Theater. Around the world, the Museum is known for digital experiences such as Mission: Mars on Roblox, and traveling exhibitions such as the Science Behind Pixar. Learn more at https://www.mos.org/
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