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NASA's Juno mission to Jupiter will examine the origin and evolution of the solar system's largest planet.

UA Scientist to Delve into Jupiter's Secrets in Flyby

Juno spacecraft reaches solar system's largest planet July 4 after five-year journey.

The barred spiral galaxy NGC 6217 is the first image of a celestial object taken with the newly repaired Advanced Camera for Surveys (ACS) aboard the Hubble Space Telescope.

Flagstaff Astronomers Find Planet Orbiting Young Star

Prior discoveries of big planets were limited to old stars; this one's 'only' 2 million years.

UA planetary scientist Erich Karkoschka's images of Jupiter and Uranus are featured on US postage stamps issued May 31, 2016.

UA Planetary Images Get (Postage) Stamp of Approval

Scientist’s work will now grace U.S. mail

A clock counts down the days until the OSIRIS-REx launch in September 2016.

Spacecraft for UA Asteroid Mission Heads to Florida Friday

Preparation begins for launch Sept. 8 on seven-year-long mission.

Tucson Researcher Receives Honor for Service to Planetary Science

Planetary Science Institute head Mark V. Sykes awarded by peers

Students at Cienega High School in Vail use telescopes to observe Mercury passing between the Sun and Earth during the May 9, 2016, transit event.

Vail's Cienega High Students to Document 2017 Solar Eclipse

Monday's Mercury transit provides telescope and data collection training.

Mercury Will Pass Between Earth, Sun in Rare Event

Mount Lemmon SkyCenter to host program for early-morning viewing.

William Hartmann photographs an image of the Moon projected on a three-foot hemisphere in the UA Lunar and Planetary Lab's first premises, a Quonset hut.

Book Chronicles History of Planetary Science in Tucson

'Under Desert Skies' details pivotal role played by UA scientists

The WIYN Observatory with a 3.5-meter telescope atop Kitt Peak National Observatory.

New Instrument at Kitt Peak to Search for Exoplanets

NEID will measure the tiny back-and-forth wobble of a star.

This image of the dwarf planet was captured from New Horizons on July 13, 2015, about 16 hours before the moment of closest approach. The spacecraft was 766,000 kilometers from the surface.

Researcher: Part of Pluto Younger Than Thought

Photos show one region with smooth surface, indicating it is less than 10 million years old.

The mission to collect samples from the asteroid 1999 RQ36 is scheduled to launch in 2016, and will return to earth in 2023.

Student-Built Experiment Part of UA’s OSIRIS-REx Spacecraft

Instrument will help identify minerals and chemicals on target asteroid, set for September launch.

This image was composed from a series of images taken Oct. 12, 2015, when Lunar Reconnaissance Orbiter was about 83 miles (134 kilometers) above the moon's far side crater Compton.

Christmas Full Moon: Bright Ornament in the Sky

First holiday occurrence in 38 years; we won't have another for 19 years.

The hollow drill bit — also called an augur — collects samples while drilling.

Engineers Test Drill to Look for Life Below Martian Surface

California gypsum quarry provides terrain similar to red planet.

Artist's rendition of Planetary Resources, Inc.'s Arkyd 6 asteroid exploration spacecraft.

Law Opens Door for Mining The Moon, Asteroids, Other Planets

University of Arizona alumnus leads exploration 'from science fiction to science fact.'

Beyond Our Solar System, Too Many Worlds To Name

Tucson-based scientist looks back on 20 years of interplanetary discoveries.

New Horizons captured this image of Pluto's glacial ice cap in July 2015.

'Mind-Boggling:' Pluto Fly-By Reveals Slushy Glaciers

New Horizons spacecraft took pictures in July; analysis under way in Flagstaff.

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