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Six Planetary Science Institute members traveled to Capitol Hill on the evening of Monday, May 19 to attend the Congressional Planetary Science Caucus kick-off reception. They set up a PSI table to ...

May 27, 2025, TUCSON, Ariz. – In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and planetary masses orbit their stars – sometimes ...

Sept. 16, 2024, Tucson, Ariz. – A new analysis of maps of the near and far sides of the Moon shows that there are multiple sources of water and hydroxyl in the sunlit rocks and soils, including ...

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 ...

Feb. 14, 2024, Tucson, Ariz. – Stars that pass by our Solar System have altered the long-term orbital evolution of planets, including Earth, and by extension modified our climate. “Perturbations – a ...

January 15, 2024, Tucson, Ariz. – Using impact craters as a dating tool, Planetary Science Institute Research Scientist Alexander Morgan has determined maximum timescales for the formation of Martian ...

A mysterious object discovered in the main asteroid belt in 2021 was determined to be a main-belt comet by Planetary Science Institute Senior Scientist Henry Hsieh, Scott Sheppard of the Carnegie ...

Nov. 1, 2024, TUCSON, Ariz. – On a cold, ancient Mars, rivers flowed and a lake the size of the Mediterranean Sea swelled under the protection of thick ice ceilings, according to new research ...

NASA announced that it has selected a proposal led by Planetary Science Institute Research Scientist Kirby Runyon to train hundreds of citizen scientists to map the Moon in high resolution. PSI Senior ...

June 6, 2024 Tucson, Ariz. – Mars polar ice caps were one of the first Earth-like characteristics identified on Mars. Since the development of film in the 19th Century, researchers expected to see ...

Detection and mapping of minerals, vegetation species, chemicals, liquids, and solids is being done through the field of imaging spectroscopy. Imaging spectrometers are deployed on aircraft, ...