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Celestial Mechanics

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Planets, solstice and asteroids: 5 stargazing events for June 2026
Science

Planets, solstice and asteroids: 5 stargazing events for June 2026

  • Janet Loehrke USA Today
  • Updated Jun 5, 2026

There will be plenty of celestial events this June, from planetary conjunctions and the summer solstice to a micro full Strawberry Moon.

New study with Tucson ties sheds light on how black holes binge and purge
Local College News

New study with Tucson ties sheds light on how black holes binge and purge

  • Henry Brean
  • Updated Nov 21, 2025

A study involving University of Arizona astronomers and telescopes is shedding new light on how black holes feed on matter and belch out energy.

The summer solstice is here. What to know about the longest day of the year

The summer solstice is here. What to know about the longest day of the year

  • Associated Press
  • Updated Sep 22, 2025

Friday is the longest day of the year north of the equator, where the solstice marks the start of astronomical summer.

Letter: Astronomer Vera Rubin: A DEI activist
Letters to the Editor

Letter: Astronomer Vera Rubin: A DEI activist

  • Lynne Lamberg, Foothills
  • Feb 19, 2025

Thanks to Edward Espinoza (Letter to the Editor, History rewritten, Feb 17, 2025) for noting Trump’s anti-DEI crusade has prompted the federal…

Skygazers February Program
Clubs

Skygazers February Program

  • Sam Miller
  • Updated Mar 7, 2026

The SaddleBrooke Skygazers Astronomy Club will present Dr. Manisha Shrestha, a postdoctoral researcher at the University of Arizona on Sunday,…

U of A researchers describe cosmic 'kiss' that bound Pluto to largest moon
Local College News

U of A researchers describe cosmic 'kiss' that bound Pluto to largest moon

  • Henry Brean
  • Updated Feb 25, 2026

University of Arizona researchers have unveiled evidence of romance at the farthest reaches of the solar system: a cosmic kiss that started Pluto’s extremely long-term relationship with its largest moon, Charon.

Sky Spy: Welcome the autumnal equinox
Entertainment

Sky Spy: Welcome the autumnal equinox

  • By Tim Hunter Special to the Arizona Daily Star
  • Updated Sep 30, 2015

Fall arrives next week, and Mars is moving eastward.

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