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Bob Pappalardo

@rpappalardo.bsky.social

Planetary scientist, icy moons a specialty. Europa Clipper Project Scientist at NASA’s JPL. Opinions are my own, or my cats'.

577 Followers  |  170 Following  |  96 Posts  |  Joined: 22.08.2023
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Posts by Bob Pappalardo (@rpappalardo.bsky.social)

Geologists say it parallel to the way we say potassium feldspar, K-spar. Definitely Co-spar.

08.03.2026 22:13 — 👍 3    🔁 0    💬 0    📌 0
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NASA, OPM Launch NASA Force to Recruit Top Talent for US Space Program - NASA The U.S. Office of Personnel Management (OPM) and NASA announced NASA Force on Wednesday, a dedicated talent track within the US Tech Force initiative

WTF is this and why didn't they want all the top talent they've been firing from NASA centers for the last couple of years www.nasa.gov/news-release...

04.03.2026 16:58 — 👍 75    🔁 20    💬 8    📌 4

Mr. (Meat) Loaf would be horrified!

21.02.2026 06:16 — 👍 1    🔁 0    💬 1    📌 0
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Wow.

17.02.2026 03:59 — 👍 35948    🔁 16651    💬 1301    📌 2472
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RIP Bud Cort. How else would you even pay tribute to him.

11.02.2026 20:51 — 👍 1706    🔁 503    💬 53    📌 77
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NASA’s Galileo Mission Points to Ammonia at Europa, Recent Study Shows - NASA Science New analysis of decades-old data has turned up a significant result: the first discovery of ammonia-bearing compounds on the surface of Jupiter’s moon Europa.

Mining of the Galileo infrared data suggests ammonia compounds at Europa! Nitrogen is a critical element for life as we know it. This provides additional fodder for the Europa Clipper mission, making the first of 49 Europa flybys on March 7, 2031!
science.nasa.gov/blogs/scienc...

29.01.2026 21:43 — 👍 9    🔁 1    💬 1    📌 1
Statement from Michael and Susan Pretti
Parents of Alex Jeffrey Pretti

“We are heartbroken but also very angry.

Alex was a kindhearted soul who cared deeply for his family and friends and also the American veterans whom he cared for as an ICU nurse at the Minneapolis VA hospital. Alex wanted to make a difference in this world. Unfortunately, he will not be with us to see his impact.

I do not throw around the ‘hero’ term lightly. However, his last thought and act was to protect a woman. The sickening lies told about our son by the administration are reprehensible and disgusting. Alex is clearly not holding a gun when attacked by Trump’s murdering and cowardly ICE thugs. He had his phone in his right hand and his empty left hand is raised above his head while trying to protect the woman ICE just pushed down, all while being pepper sprayed. 

Please get the truth out about our son. He was a good man. Thank you.

Statement from Michael and Susan Pretti Parents of Alex Jeffrey Pretti “We are heartbroken but also very angry. Alex was a kindhearted soul who cared deeply for his family and friends and also the American veterans whom he cared for as an ICU nurse at the Minneapolis VA hospital. Alex wanted to make a difference in this world. Unfortunately, he will not be with us to see his impact. I do not throw around the ‘hero’ term lightly. However, his last thought and act was to protect a woman. The sickening lies told about our son by the administration are reprehensible and disgusting. Alex is clearly not holding a gun when attacked by Trump’s murdering and cowardly ICE thugs. He had his phone in his right hand and his empty left hand is raised above his head while trying to protect the woman ICE just pushed down, all while being pepper sprayed. Please get the truth out about our son. He was a good man. Thank you.

Kare 11 local news just read, in full, this statement from Michael and Susan Pretti, the parents of Alex Pretti.

"Please get the truth out about our son."

25.01.2026 00:43 — 👍 24925    🔁 12850    💬 200    📌 448

Hooray, they are out! I’ve been waiting and now will begin the hunt for them here in LA’s San Gabriel Valley.

22.01.2026 14:38 — 👍 1    🔁 0    💬 1    📌 0

History will not be kind to the sycophants who continue to echo his lunacy.

21.01.2026 14:18 — 👍 0    🔁 0    💬 0    📌 0
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BREAKING: ICE agents in Minneapolis violently detained and arrested a U.S. citizen for one reason only: he refused to prove his citizenship.

No crime. No warrant. No probable cause.

13.01.2026 19:27 — 👍 8419    🔁 4642    💬 1179    📌 562
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MPR News on Instagram: "On Tuesday, Jan. 13, a woman in south Minneapolis was stopped by ICE, pulled from her car and carried by agents into their vehicle. As she was being carried the woman told agen... 3,476 likes, 207 comments - mprnews on January 13, 2026: "On Tuesday, Jan. 13, a woman in south Minneapolis was stopped by ICE, pulled from her car and carried by agents into their vehicle. As she was...

Dear sweet Jesus, these photos from after they drag her away are even worse. (h/t @mprnews.org, doing the Lord's work).

www.instagram.com/reel/DTdrPvZ...

13.01.2026 20:56 — 👍 754    🔁 309    💬 3    📌 32
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Today at 34 & Park in Minneapolis, a woman tried to drive down the street where a protest had broken out in front of a home ICE was raiding, saying she had a doctor apt to get to. ICE agents busted out her windows, cut off her seatbelt, and pulled her out before arresting her.

13.01.2026 18:56 — 👍 11232    🔁 6379    💬 142    📌 1725
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Just like the Nazi Gestapo, they went door to door looking for Jews! #arrestice #minnesota

13.01.2026 23:13 — 👍 17    🔁 12    💬 1    📌 2
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PSCW 2026

Planetary friends!

Don't want to go to Houston in March, or support an institute that's bending the knee?

Then join us for the very first Planetary Science Community Workshop in Louisville, KY on April 14–16, 2026.

It's our community. Fight for it!

Details at the link:

planetaryworkshop.org

09.01.2026 01:28 — 👍 67    🔁 21    💬 1    📌 3

Nothing so perfectly proves the concept of whiteness as a social construct than the reality that white people who stand up for minorities forfeit some of the protections that whiteness afforded them.

08.01.2026 16:28 — 👍 846    🔁 222    💬 6    📌 10

Awesome!

08.01.2026 14:35 — 👍 1    🔁 0    💬 1    📌 0

Happy "Not Submitting an LPSC Abstract Today" to those who celebrate.

06.01.2026 14:07 — 👍 28    🔁 7    💬 3    📌 1

I’ve attended most years since 1987, but no more.

04.01.2026 06:36 — 👍 4    🔁 0    💬 0    📌 0

Yum!

01.01.2026 20:26 — 👍 0    🔁 0    💬 0    📌 0

Lightning and parades with metal bleachers don’t mix. They should postpone a day or may risk liability.

31.12.2025 06:18 — 👍 1    🔁 0    💬 1    📌 0

Coldplay—omg our priorities.

30.12.2025 16:43 — 👍 1    🔁 0    💬 0    📌 0
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A career in a file drawer, succinct and color-coded. An office move, 21st Century reality and Mabel’s urging combined to convince me to retain just several hardcopies of each publication (with placeholders for many not yet printed). An adjacent empty drawer awaits Europa Clipper’s scientific bounty.

30.12.2025 16:39 — 👍 5    🔁 0    💬 0    📌 0
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🚨 SAVE THE DATE 🚨

We're putting together a Planetary Science Community Meeting at the Kentucky Science Center in Louisville, KY on April 14–16 2026.

This is a grass-roots meeting for planetary scientists to gather, discuss, and organize to address pressing issues our community faces.

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17.12.2025 22:50 — 👍 57    🔁 23    💬 2    📌 1
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Happy Holidays from Europa Clipper!

23.12.2025 21:56 — 👍 5    🔁 0    💬 0    📌 0
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Europa Clipper instrument uniquely observed interstellar comet 3I/ATLAS | Southwest Research Institute SwRI-led Ultraviolet Spectrograph viewed 3I/ATLAS both when and where most other assets could not

OUR CLIPPER PRESS RELEASE FOR COMET 3I/ATLAS IS OUT 🥹

i can’t even begin to describe what it feels like to be looking at new and exciting data with europa clipper. it’s a dream come true 😭

www.swri.org/newsroom/pre...

18.12.2025 17:16 — 👍 105    🔁 28    💬 3    📌 3
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Europa Clipper has observed interstellar comet 3I/ATLAS with its ultraviolet spectrograph instrument! News here:
www.swri.org/newsroom/pre...

18.12.2025 17:24 — 👍 72    🔁 25    💬 1    📌 1
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Chris Glein delivers an informative and inspiring Sagan Lecture on ocean worlds as potential abodes of life at #agu25.

15.12.2025 23:06 — 👍 5    🔁 0    💬 0    📌 0
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Comet 3I/ATLAS shows activity in Juice navigation camera teaser Comet 3I/ATLAS shows activity in Juice navigation camera teaser

The ESA Juice mission observed interstellar comet 3I/ATLAS! www.esa.int/ESA_Multimed...

04.12.2025 16:54 — 👍 15    🔁 7    💬 0    📌 0
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UCF Study Explores Formation of Spider-Like Features on Jupiter’s Moon Europa and Potential for Life UCF Physics Professor Lauren McKeown and colleagues are studying a spider-like formation on Jupiter’s icy moon Europa to understand how it formed and what it reveals about subsurface brine pools and p...

Might the surface of Europa hint at subsurface brines?
www.ucf.edu/news/ucf-stu...

02.12.2025 22:35 — 👍 4    🔁 0    💬 0    📌 0
A crescent moon glows orange as it sets over a hill, aside the glow of Downtown Los Angeles, viewed from afar.

A crescent moon glows orange as it sets over a hill, aside the glow of Downtown Los Angeles, viewed from afar.

Goodnight Moon.
#dtla #moonset

26.11.2025 05:31 — 👍 6    🔁 0    💬 0    📌 0