PSI is a private nonprofit dedicated to studying the origin, characteristics, and evolution of Earth, our Solar System, and planetary systems around other stars
Tucson, AZ
Joined September 2013
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This Veterans Day, PSI honors those who have served in the United States Armed Forces.
We're especially grateful for the veterans who are part of the PSI community. Their service, dedication, and contributions are deeply appreciated.
To all veterans, thank you for your service.
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📬 The latest PSI Weekly Briefing is here!
Catch up on the latest science, people, and happenings from around the Planetary Science Institute, all in one place.
➡️ Read + subscribe: buff.ly/p002AB6
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PSI scientist JA Grier recently chatted all about the Moon with @TheLiuniverse podcast. Listen ⬇️
🌟NEW! The LIUniverse: Swirls, Rays, and other Moon Oddities with Dr. JA Grier💫
🎧wherever you get your #podcasts
⏬ theliuniverse.podbean.com/e/…
▶️ youtu.be/aMXO5ej4-A8
@CUNYGC_ASTRO @GC_CUNY @csinews @AMNH @chuckliu @AllenGalileo
#podcast #science #space #astronomy #moon
Planetary science Ph.D. students: Applications are OPEN for PSI's Pierazzo International Student Travel Awards!
Two awards of up to $2,500 support international conference travel in 2027.
⏰ Apply by Nov. 24 at 9 p.m. MST.
🔗 buff.ly/CWsJgIZ
Welcome to PSI, Marley Chertok!
Marley studies the Moon's geologic history, using impact craters and surface features to uncover how it evolved and what future astronauts might encounter during lunar exploration.
We're excited to have Marley on the team!
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Congratulations to PSI's JA Grier, the new chair of @AAS_DPS! 🎉
JA stepped into the role at #DPS2026, bringing decades of experience in planetary science research, education, and community leadership.
Read more: buff.ly/1wepPIy
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📬 The latest PSI Weekly Briefing is here!
Catch up on the latest science, people, and happenings from around the Planetary Science Institute, all in one place.
➡️ Read + subscribe: buff.ly/ZPM16gv
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Sending yourself to Titan might still be a while away, but you can send your name now! ⬇️
Your name could fly on Saturn’s largest moon.
NASA’s Dragonfly mission will launch in 2028 to explore the dunes, lakes, and rivers of Saturn’s moon, Titan, and your name can come along! Join the voyage and claim your boarding pass: go.nasa.gov/dragonfly-names
ALT A poster-style graphic of the the Dragonfly rotorcraft and two example boarding passes with a reddish-tan background. Text on the graphic reads "Journey to Titan" and "Fly your name to another world!"
How can scientists identify minerals on distant asteroids?
PSI's Jean-Philippe Combe explores techniques for detecting olivine on asteroid Vesta using near-infrared spectroscopy, comparing methods for speed and accuracy.
#DPS2026
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Planetary science meets art at Burning Man!
PSI's Jamie Molaro shares the Skyhorse Carousel, an unconventional approach to bringing science to new audiences through art and informal outreach.
#DPS2026
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What's next for the planetary science community?
At #DPS2026, PSI's JA Grier presents a strategic vision for sustaining, rebuilding, and transforming a strong, ethical planetary science research community.
TOMORROW: PSI Director and CEO Amanda Hendrix explores how the spectral characteristics of primitive asteroids vary with their type and distance from the Sun.
#DPS2026
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A meteorite that fell in France more than 200 years ago may hold clues to the history of asteroid Vesta.
At #DPS2026, PSI's Jean-Philippe Combe revisits the Juvinas meteorite and explores questions about its origins.
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What can Saturn's largest moon teach us about the ingredients for life?
PSI's Catherine Neish explores Titan's fascinating chemistry in the 2026 DPS Alexander Prize presentation.
Don't miss this special talk at #DPS2026!
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New research led by PSI's Jordan Steckloff reveals a "kilometer-size barrier" that prevents asteroids from breaking directly into dust, challenging previous models of planetary debris formation.
MORE: buff.ly/rQ75Ikf
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Some distant worlds may be living on borrowed time! 🪐
PSI's Elisabeth Adams shares the latest candidate planets potentially headed toward destruction by their host stars, along with an introduction to the Transit Archive Project.
#DPS2026
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PSI's Jordan Steckloff explores how the powerful gravity of white dwarf stars tears apart asteroids and why the resulting debris may have a characteristic size.
#DPS2026
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PSI's Jamie Molaro examines fatigue-crack formation in samples returned from asteroid Bennu, offering insight into how asteroid surfaces change over time.
Catch the presentation tomorrow morning at #DPS2026!
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TOMORROW: PSI's Jordan Steckloff will share new research during a press conference at #DPS2026!
Livestream: buff.ly/4Ixm2hn
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🌕 Could caves be hiding beneath the Moon's surface?
Join PSI's Dr. Than Putzig on Nov. 11 in Tucson to learn how the NASA-selected GIMLI investigation will search for what lies beneath and why it matters for future human exploration.
🎟️ Tickets: $20
🔗 buff.ly/p6k1cfa
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