John Grunsfeld
@SciAstro
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Former lead for Science at NASA (Associate Administrator) Astronaut STS-67,81,103,109,125 Hubble Hugger, Space and Earth explorer
Joined February 2012
Please join the Space Cadets 4 Harris call this Thursday, August 15th.
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Democracy dies in darkness….
Over 200,000 subscribers flee 'Washington Post' after Bezos blocks Harris endorsement @BlueOrigin @washingtonpost.
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RT @NASAWatch: FYI Greg Autry @GregWAutry at @UCF @UCFBusiness @ucfspacebiz really wants to be the next @NASA Administrator. With #Project2….
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Happy Birthday @KamalaHarris. May your youth propel you across the finish line to become #POTUS.
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RT @EuropaClipper: It's one of the most intriguing locations for understanding the possibilities of extraterrestrial life. Learn more about….
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I last launched from Pad 39A in 2009 aboard Space Shuttle Atlantis in 2009 to @NASAHubble. Today a mission I helped to start, the @EuropaClipper, departs for Jupiter and its rendezvous with #Europa. Go Clipper! Watch here
nasa.gov
NASA live: Follow live television broadcasts on NASA+, the agency's streaming service, and NASA's social media channels with this schedule of upcoming live events including news briefings, launches...
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Are we alone in the Universe? Today is game time for the Europa Clipper which can look for signs of life and habitability on this icy moon of Jupiter. Launch from pad 39A at Kennedy Space Center is an hour away. Go Clipper!
science.nasa.gov
Europa Clipper is Earth's first mission to conduct a detailed science investigation of Jupiter's moon Europa.
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If you inclined to contribute (please do) as a space nerd, visit:
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Please join Lynda Carter, Stacey Abrams, and a cast of Star Trek actors, astronauts and other luminaries for "Geeks and Nerds for Harris" tomorrow night 24 September 8pm ET/5pm PT.
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Join SpaceCadets4Harris as we come together for the #UniteForAmerica livestream with @Oprah, @KamalaHarris and @WinWithBlackWomen. Let’s raise our voices on Sept 19th at 8 PM ET. Register now at and make an impact!.
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Everyone! Please sign up. Besides, it's free (we hope you contribute to the Harris/Walz team but not requried).
Who is this event for? EVERYONE!. Do you like space, science, science fiction, or even just want to hear @BillNye and astronauts speak to support #HarrisWalz2024? Join us!. Register here:
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Wow what an event line up! Thanks @JeriLRyan .I look forward to hearing from you at the gathering of @Space4Harris gathering.
TOMORROW!. Let’s do this, space peeps!!!.Sign up at See you there…! 💙✊🏼🖖🏼.
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It doesn't get any better than Poppy Northcutt! Please sign up tonight.
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RT @cosmobiologist: Many of us in the space industry, from scientists and engineers, astronauts and Star Trek actors, and more will be spea….
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RT @NASAHubble: Twice the telescopes = twice as iconic 🤩. Take in these views from Hubble and @NASAWebb, all featuring the star-forming reg….
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To my Twitter followers, friends, and colleagues in #Arizona -Please Please Please make sure and VOTE! I'm especially keen to see Senator Mark Kelly, a great person, patriot, pilot, engineer, and honest Senator, re-elected to the #Senate Godspeed @CaptMarkKelly.
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