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Illustration of the uncertainty of Earth's orbit 56 million years ago due to a potential past passage of the Sun-like star HD7977 2.8 million years ago. Each point's distance from the center ...

Experience the intersection of art and planetary science through the remarkable works of renowned artist, planetary scientist, and Planetary Science Institute co-founder William K. Hartmann and other ...

Your support makes a difference! As a Planetary Partner, YOU will enable our Scientists and Educators to advance world-class Solar System research and grassroots ...

July 24, 2025, TUCSON, Ariz. – On the slopes of Martian mountains and craters clings what appears to be flowing honey, coated in dust and frozen in time. In reality, these features are incredibly slow ...

Lava tubes are high priority targets for in situ exploration of Mars, with the potential to provide access to subsurface cavities that could facilitate scientific studies of the Martian subsurface as ...

As the Artemis II crew came close to passing behind the Moon and experiencing a planned loss of signal, they captured this image of a crescent Earth. Credit: NASA The participating scientists will ...

Senior Scientist Daniel Berman led a team of other PSI scientists in producing a new U.S. Geological Survey Investigations map of Mars. The map shows details of the source region of Shalbatana Vallis, ...

Oct. 28, 2024, TUCSON, Ariz. – The Moon and Mars are pocked with giant impact craters acquired very long ago, while there appears to be a dearth of them on Earth and Venus. Time may have healed many ...

An illustration of Mimas’ ice shell evolution, in which the changes in ice shell thickness (y-axis) lag behind the eccentricity decay (inverted x-axis). Time increases to the right of the plot, while ...

Top: Black and white image of the Moon from Moon Mineralogy Mapper data. Bottom: Map of water on the Moon. The different colors represent different shapes to the water absorption and correlate with ...

A child looking up close at a chondrite (rocky) meteorite with a magnifying glass at the Leman Academy Math & Science Night in Tucson, Ariz. Credit: Larry Lebofsky Our Solar System is really good at ...