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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

PSI Co-founder and Senior Scientist Emeritus William K. Hartmann painting the Milky Way Galaxy. A collection of his work, and work by other space artists, will open to the public on March 29, 2026.

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 ...

The Perseverance rover on Mars inspects a rock dubbed Cheyava Falls with the Scanning Habitable Environments with Raman & Luminescence for Organics & Chemicals (SHERLOC) instrument on its robotic arm.

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 ...

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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.