Apollo 17 astronaut Harrison “Jack” Schmitt stands next to a steep-walled crater named Shorty on Dec. 13, 1972. The UA's Jessica Barnes is among the scientists selected by NASA to be granted access to previously unopened samples, including some collected during NASA's last manned mission to the moon. (Photo: NASA)
June 18, 2019
Thanks to new technological tools, moon samples collected by the Apollo astronauts a half-century ago hold answers to questions that weren't even on scientists' minds at the time.
According to a hypothesis developed by UA alumni William Hartmann and Donald Davis, the moon was formed from a debris blown off primordial Earth by a giant impact during Earth's formation. Their 1974 paper introduced what is now the leading theory of lunar origin. (Image: William Hartmann)
June 12, 2019
Where did the moon come from? The Giant Impact Theory germinated in the mind of a UA graduate student as he mapped the surface of the moon and is still cited today as scientists learn more about our celestial neighbor.
William Hartmann projecting photographic plates of the moon onto a white globe to create the Rectified Lunar Atlas. (Courtesy: UA Lunar and Planetary Laboratory)
June 4, 2019
For decades, UA scientists have contributed to the research that has shaped our understanding of our solar system and the universe – beginning with the Apollo 11 mission 50 years ago.
The retreat of Mars' polar cap of frozen carbon dioxide during the spring and summer generates winds that drive the largest movements of sand dunes observed on the red planet. (Image: NASA/JPL/University of Arizona/USGS)
May 22, 2019
In the most detailed analysis of how sands move around on Mars, a team of planetary scientists led by the UA found that processes not involved in controlling sand movement on Earth play major roles on Mars.
Pierre Haenecour, the study's lead author, is pictured with one of the ultra-high-resolution electron microscopes used to obtain chemical and microstructural information about the stardust grain. (Photo: Maria Schuchardt/University of Arizona)
April 29, 2019
A dust grain forged in a stellar explosion predating our solar system reveals new insights about how stars end their lives and provide the building blocks of new stars and planets.
A giant of a moon appears before a giant of a planet. Titan, Saturn's largest moon, measures 3,200 miles (5,150 km) across and is larger than the planet Mercury. (Photo: NASA/JPL-Caltech/Space Science Institute)
April 29, 2019
While searching for the origins of Titan’s methane and the organics that coat its surface, UA researchers made the unexpected discovery of a large ice feature on Saturn's largest moon.
This view shows Saturn's northern hemisphere in 2016, as that part of the planet nears its northern hemisphere summer solstice in May 2017. (Photo: NASA/JPL-Caltech/Space Science Institute)
April 29, 2019
A "deep learning" approach to detecting storms on Saturn show the vast regions affected by storms and that dark storm clouds contain material swept up from the lower atmosphere by strong vertical winds.
Adam Block's photo of the Messier 87 galaxy. (Photo: Adam Block)
April 17, 2019
Astrophotographer Adam Block talks about the galaxy known as Messier 87, home of the supermassive black hole photographed by the Event Horizon Telescope.
An artist's impression of the perpetual sunrise that might greet visitors on the surface of planet TRAPPIST-1f. If the planet is tidally locked, the "terminator region" dividing the night side and day side of the planet could be a place where life might take hold, even if the day side is bombarded by energetic protons. In this image, TRAPPIST-1e can be seen as a crescent in the upper left of the image, d is the middle crescent, and c is a bright dot next to the star. Image credit: NASA/JPL-Caltech
April 16, 2019
Two new studies by UA space scientists may bring into question the habitability of TRAPPIST-1 exoplanets, three of which are in the habitable zone of space.