John Grunsfeld Profile
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
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@SciAstro
John Grunsfeld
1 year
Please join the Space Cadets 4 Harris call this Thursday, August 15th.
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John Grunsfeld
9 months
Democracy dies in darkness….
@NASAWatch
NASA Watch
9 months
Over 200,000 subscribers flee 'Washington Post' after Bezos blocks Harris endorsement @BlueOrigin @washingtonpost.
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John Grunsfeld
9 months
RT @NASAWatch: FYI Greg Autry @GregWAutry at @UCF @UCFBusiness @ucfspacebiz really wants to be the next @NASA Administrator. With #Project2….
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John Grunsfeld
9 months
Happy Birthday @KamalaHarris. May your youth propel you across the finish line to become #POTUS.
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@SciAstro
John Grunsfeld
9 months
RT @EuropaClipper: It's one of the most intriguing locations for understanding the possibilities of extraterrestrial life. Learn more about….
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John Grunsfeld
9 months
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
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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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@SciAstro
John Grunsfeld
9 months
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!
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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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John Grunsfeld
10 months
Space Cadets for Harris Gear is now available from MerchPAC. @Space4Harris @KamalaHarris.
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@SciAstro
John Grunsfeld
10 months
If you inclined to contribute (please do) as a space nerd, visit:
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@SciAstro
John Grunsfeld
10 months
Starting right now: Geeks and Nerds for Harris.
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John Grunsfeld
10 months
RT @GovofCO: Voting is an important way to shape the future of our country and have your voice heard. Register to vote at .
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John Grunsfeld
10 months
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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John Grunsfeld
10 months
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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@SciAstro
John Grunsfeld
11 months
Everyone! Please sign up. Besides, it's free (we hope you contribute to the Harris/Walz team but not requried).
@Space4Harris
SpaceCadets4Harris
1 year
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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John Grunsfeld
11 months
Wow what an event line up! Thanks @JeriLRyan .I look forward to hearing from you at the gathering of @Space4Harris gathering.
@JeriLRyan
Jeri Ryan
11 months
TOMORROW!. Let’s do this, space peeps!!!.Sign up at See you there…! 💙✊🏼🖖🏼.
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John Grunsfeld
1 year
It doesn't get any better than Poppy Northcutt! Please sign up tonight.
@poppy_northcutt
Poppy Northcutt
1 year
I am all in for the Space Cadets for Harris Zoom call tomorrow. ⁦@Space4Harris⁩ ⁦@harrisdemocrats
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John Grunsfeld
1 year
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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@SciAstro
John Grunsfeld
1 year
RT @SciAstro: Please join the Space Cadets 4 Harris call this Thursday, August 15th.
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@SciAstro
John Grunsfeld
3 years
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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John Grunsfeld
3 years
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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