PSI is launching The Art of Discovery evening lecture series, and we’d love for you to join us for our inaugural event on Friday, October 23! This series will bring scientists, space enthusiasts, and ...

Impacts can carve out large craters because the mass and velocity of the impactor work together to shatter the landscape in much the same way as the mass and ...

The Marius Hills Pit (MHP) on the surface of the Moon. MHP will be studied by PSI-led GIMLI, through the NASA PRISM program, to investigate a possible lava tube beneath the surface. Credit: ...

Sept. 22, 2026, TUCSON, Ariz. — Conditions on the early Earth may have become stable enough to sustain the chemistry associated with the origins of life around 4.33 billion years ago, according to new ...

This post is based on content originally created by Gregg Herres and William K Hartmann. We are bringing it to you today, as we celebrate the Moon with International Observe the Moon Night, and as we ...

When Henry Hsieh started graduate school, he was interested in comets for a fairly simple reason: they seemed exciting. Unlike distant objects that could appear as little more than points of light, ...

Pluto is on an icy march away from the Sun. In the year 2114, it will turn back, but until then, its elliptical orbit will carry it to colder and darker parts of the outer solar system. This is ...

This artist's illustration shows a white dwarf star surrounded by a debris disk with three asteroids orbiting in the disk. Credit: Pamela L. Gay / PSI Just as you may look to your grandparents to ...

This image shows Jupiter (dimmed by a neutral density filter), and Jupiter’s surrounding torus of material. You will also see Jupiter’s Galilean Moons dancing through the field as the orbit. Rj Is the ...

Sanlyn Buxner discusses the near and far sides of the Moon at the STEMAZing Solar System Exploration – Workshop for Educators that took place at PSI. Credit: Alan Fischer/PSI. PSI hosted a dozen pre-K ...

Long period comet C/2006 P1 (McNaught) over the Pacific ocean, as imaged from Paranal Observatory in 2007. Credit: ESO/Sebastian Deiries The Gaia mission has allowed researchers to understand the ...