Space

Roberto Furfaro and Vishnu Reddy make up the UA team on the Lunar Meteoroid Impacts Observer project, which seeks to investigate meteoritic impact on the far side of the moon.

Revealed by the UA-led HiRISE camera, sheets of water ice beneath the surface on Mars hold clues to the planet's climate history — and might yield drinking water for future astronauts.

The CAESAR mission, short for Comet Astrobiology Exploration Sample Return, would return a sample from a comet to determine its origin and history.

The discovery of a supermassive black hole, 800 million times the mass of the sun, has researchers puzzled. The object is the most distant quasar known to date.

An international drill led by Vishnu Reddy tests astronomers' ability to respond to a highly unlikely — but not impossible — scenario: an asteroid on course to collide with Earth.

Seasonal dark streaks on Mars have been described as possible signs of flowing water, but a new study shows they are a better fit to dry flow processes.

Astronomers led by the UA's Vishnu Reddy have confirmed the true asteroid nature of one of Earth's companions on its journey around the sun. The small near-Earth object known as 2016 HO3 measures no more than 100 meters across and appears to circle around the Earth as a "quasi-satellite."

Asteroid 288P, first discovered more than a decade ago by the UA's Spacewatch program, is one of the most unusual known objects of the main asteroid belt between Mars and Jupiter. It's the first known binary asteroid also classified as a comet.

As the OSIRIS-REx spacecraft performs a maneuver to embark on its trajectory to asteroid Bennu, scientists and engineers from all of the mission's teams convene at the UA.

UA professor Alfred McEwen recounts some of the highlights of NASA's Cassini-Huygens mission, in which UA researchers played significant roles. The spacecraft's final plunge into the upper atmosphere of Saturn on Friday will mark the end of the nearly 20-year mission.