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'.

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...

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.

science.nasa.gov

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.

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.

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.

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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. (1/2)

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it’s SO exciting to see images from a spacecraft you work on, even if they’re just test images 🥹 this is a starfield image from europa clipper, including the planet uranus! it was taken to test clipper’s star-tracking cameras!!

An annotated version of the image with Uranus and several background stars labeled.
NASA/JPL-Caltech