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Six comet scientists met at Tucson’s Hacienda Del Sol Resort for the first Belton Symposium. From left to right is Björn Davidsson of NASA’s Jet Propulsion Laboratory, Karen Meech of the Institute for ...

The north pole of Saturn's moon Enceladus, pictured above, was found to have significant heat flow, overturning previous assumptions that heat loss was confined to its geologically active south pole.

A recent large survey of low-albedo asteroid spectra in the 3-μm region show a range of hydrated compositions, with one large group similar to the CM chondrites and a second large group showing ...

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Visitors in the PSI parking lot view the Moon and Saturn through telescopes on Oct. 28, 2015. Credit: PSI/Alan Fischer On the evening of Oct. 28, 2025, the Planetary Science Institute hosted a ...

Painting by PSI Cofounder and Senior Scientist Emeritus William K. Hartmann As Siding Spring Comet passed by Mars on Oct. 19, 2014, it broke up in the atmosphere, creating a luminescent shower in the ...