The former astronomical hot spot of the world is finding itself in a battle to remain relevant. Kitt Peak National Observatory, located about 55 miles southwest of Tucson, was founded in 1958. It...

Usually when people observe hot gas coming out of something, they are watching a politician deliver a speech. Astronomers have found objects that do the same thing but in a far more spectacular fashion. Quasars...

  Arizona is one of the best places in the world to see the stars but its stargazing nights might be numbered. Light pollution primarily from Phoenix is degrading the night skies, diminishing the...

Tucson, which has long prided itself on its commitment to the containment of light pollution, is falling behind on that count as other cities join in the international movement to encourage darker skies...