A decade ago this week, NASA’s New Horizons mission snapped the first-ever close-up image of Pluto. The awe-inspiring portrait of the dwarf planet featured a heart-shaped plane of frozen nitrogen and methane, which was soon … Read More
July 15, 2025, TUCSON, Ariz. – The United Nations General Assembly agreed in 2021 to dub July 20 International Moon Day, which celebrates the anniversary of the first landing by humans on the Moon on … Read More
July 15, 2025, TUCSON, Ariz. – Orbiting in the outskirts of the Solar System is a mysterious object moving in rhythm with Neptune, according to a new paper published in the Planetary Science Journal. The … Read More
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. After introductions, the … Read More
Planetary Science Institute Senior Scientist Roger Clark was named a Fellow of the American Association for the Advancement of Science, a distinguished lifetime honor within the scientific community. He received a certificate and a gold and blue … Read More
June 26, 2025, TUCSON, Ariz. – June 30 is Asteroid Day, the United Nations sanctioned day of public awareness of the importance of asteroids. Asteroid Day is observed on the anniversary of the Siberia Tunguska … Read More
June 26, 2025, TUCSON, Ariz. – After nearly 20 years of operations, NASA’s Mars Reconnaissance Orbiter, or MRO for short, is on a roll, performing a new maneuver to squeeze even more science out of … Read More
(This was first published as an Op-Ed in the Arizona Daily Star and is the opinion of PSI director and CEO Amanda Hendrix.) When I was a third grader in 1976, I was struck by … Read More
The march of the planets around the Sun may seem interminable, but new research suggests that the likelihood of another star in our galaxy passing by and disrupting our Solar System is slightly higher than … Read More
PSI Research Scientist Kirby Runyon traveled from Washington, D.C. to Flagstaff, Arizona to participate in a cratering workshop from July 14-15 called ICAARUS, short for Impact Cratering and Associated Research United States. It was sponsored … Read More
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