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Planetary Science Institute (PSI) Profile
Planetary Science Institute (PSI)

@planetarysci

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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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@planetarysci
Planetary Science Institute (PSI)
1 day
PSI scientist, staff and their families gathered early last week for the 2025 Annual Retreat. Director Amanda Hendrix delivered the State of PSI address to kick it off. Read what she had to say:
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@planetarysci
Planetary Science Institute (PSI)
4 days
Happy Friday! 🪐 🐾 . Ahhhh. living the dream! PSI's Kimberly Foote notes that her canine companion and #PlanetaryPet, Princess, has a blissfully stress-free life.
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@planetarysci
Planetary Science Institute (PSI)
5 days
Receive more stories and Q&As like this one directly in your inbox when you subscribe to our newsletter, the PSI Weekly Briefing:
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psi.edu
Meet our Scientists and Educators. Learn about their latest discoveries throughout the Solar System and Universe, their adventures in the field, and their collaborations. And, of course…
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@planetarysci
Planetary Science Institute (PSI)
5 days
Describe an exciting career discovery:.The discovery of a thermal anomaly on Saturn's moon Mimas. Our discovery was quickly dubbed Pac-Man on Death Star - the thermal anomaly looked like the '80s video icon PacMan, Mimas looks like the Death Star. More:
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@planetarysci
Planetary Science Institute (PSI)
6 days
#JunoCam: Citizen Scientists processed an image to intensity the color and contrast, resulting in this deep and dramatic view of the Solar System giant. Process your own JunoCam images: . @NASA / @NASAJPL / @SwRI / #MSSS / Gerald Eichstädt / @ThThomopoulos
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@planetarysci
Planetary Science Institute (PSI)
7 days
PSI In the News: Previously believed to be mostly rock, Mars' glaciers shown to be 80% pure ice. Read the story here:
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earth.com
Scientists find Mars' glaciers are rich in ice, not rock, revealing clues about its frozen past and its promise for future missions.
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@planetarysci
Planetary Science Institute (PSI)
8 days
PSI Retreat 2025 is in full swing! We've gathered to catch up with distant friends, provoke creative ideas and strategize for the future. We also celebrated birthdays and heard planetary poetry! And it's only the first day.
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@planetarysci
Planetary Science Institute (PSI)
8 days
Benecchi and other PSI scientists recently reflected on the 10-year anniversary of New Horizon's Pluto flyby. Read that story and a Q&A with Benecchi in our newsletter, the PSI Weekly Briefing, and don't forget to subscribe! .
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@planetarysci
Planetary Science Institute (PSI)
10 days
PSI's Kat Volk spoke with Tucson's KOLD 13 news about the recently discovered trans-Neptunian object. WATCH:
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@planetarysci
Planetary Science Institute (PSI)
11 days
The Pinacates of the Sonoran Desert are often compared to other worlds in our Solar System. PSI's David Crown spoke with Arizona Science about how researchers are comparing the Pinacate’s ancient lava flows to photographs taken of Mars by robotic explorers.
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@planetarysci
Planetary Science Institute (PSI)
11 days
Happy Friday! 🪐 🐾 . This week's #PlanetaryPets are Marc Mensing's cats Sasha (tuxedo) and Raph (orange), who were adopted from the Humane Society and now live a life of "snacks, cat beds, cuddles, and chaos."
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@planetarysci
Planetary Science Institute (PSI)
12 days
Ultimately, this provides a clearer understanding of Mars’ climate history and a possible resource for future utilization. Read more:
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@planetarysci
Planetary Science Institute (PSI)
12 days
Scientists discovered an object that orbits the Sun once for every ten Neptunian orbits. “This is just the beginning,” said Kathryn Volk, a researcher at PSI. “We’re opening a new window into the solar system’s past.” . Full story:
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dailygalaxy.com
A mysterious space rock far beyond Neptune has caught astronomers' attention with an orbit unlike anything seen before.
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@planetarysci
Planetary Science Institute (PSI)
13 days
To process your own JunoCam images, visit . 📸: @NASA / @NASAJPL / @SwRI / #MSSS / Gerald Eichstädt / @ThThomopoulos.
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@planetarysci
Planetary Science Institute (PSI)
13 days
#JunoCam: A citizen scientist's negative image of Jupiter. They noted: "Maybe this is how JunoCam shows us, almost live, the birth or death of a Jovian polar cyclone - a luminous ring that still hesitates to close. Two red circles have been added to show the difference."
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@planetarysci
Planetary Science Institute (PSI)
15 days
While you're there, subscribe to our newsletter, the PSI Weekly Briefing, so you can get stories like this delivered directly to your inbox! 🪐 💻 💫.
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@planetarysci
Planetary Science Institute (PSI)
15 days
ICYMI: Nine southern Arizona elementary school teachers gathered at the Planetary Science Institute in Tucson for a three-day professional development workshop organized in partnership with STEMAZing at the Pima County School Superintendent’s Office. More:
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@planetarysci
Planetary Science Institute (PSI)
15 days
Cheers to 9 years! 🥂 🍾 🙌 Some PSI Colorado colleagues got together Friday night to celebrate the 9th Anniversary of the Lakewood, CO location.
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@planetarysci
Planetary Science Institute (PSI)
16 days
Tucson Sentinel: NASA finally announces 2025 space research grants but lack of awards puts Tucson's PSI in trouble. Read the news story here:
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@planetarysci
Planetary Science Institute (PSI)
18 days
PSI's Roger Clark spoke at a gathering for the Denver Astronomical Society about aurora and airglow. Check it out here:
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