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An artist's impression shows a view of the triple star system HD 131399 from close to the giant planet orbiting in the system.

UA Student Discovers Distant Planet in Three-Star System

Four times Jupiter's mass, celestial body can offer clues to planetary formation.
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
Completed in 1962, the National Solar Observatory's McMath-Pierce Solar Telescope at Kitt Peak, Arizona, is the world's largest solar telescope.

Era of Solar Discovery on Kitt Peak Coming to an End

Larger telescope on Maui will continue research

Tucson Amateur Astronomers Host Free Star Party

Saturday is international Astronomy Day
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.
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
A time lapse photograph of light pollution from Tucson reaching the Picacho Peak night sky.

Bill Would Loosen Restrictions on Electronic Billboards

Astronomers worried that it will lead to incremental loss of dark skies.
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.

Comet Catalina Makes Brief Appearance

Discovered by Catalina Sky Survey in 2013

Arizona Spotlight for the 2015 holiday season

More local StoryCorps conversations; exploring the "Xenophobia Blues"; discovering Comet Catalina, and some of the year's best stories.
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.
False-color image of a 2011 Geminid meteor, seen by a camera at New Mexico State University.

Geminid Meteor Shower to Light Up Sky This Weekend

120 visible each hour; best viewing Sunday night into Monday morning.
Comet C/2013 US10 Catalina shows off a compact green coma and two tails in this photo taken Nov. 22, 2015, at dawn from Arizona. The green color comes from carbon compounds fluorescing in UV sunlight. Photo by Chris Schur

Astronomer Shares 'Science Snacks' With Podcasts

Comet recording exceeded 100,000 downloads

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.
Small Crater on Arcuate Ridge West of Olympia Mensae

AZ WEEK: Exploring Mars on Silver Screen, in UA Research

University of Arizona's connection to planetary science dates to dawn of Space Age.

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