Add Yahoo as a preferred source to see more of our stories on Google. An observatory on southern Arizona's highest mountain peak is reopening for public tours for the first time since March 2020, when ...

SAFFORD, Ariz. -- Firefighters widened a defensive ring around a mountaintop observatory Monday, trying to hold back two wildfires and protect a powerful telescope under construction. The crews in ...

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The UA's Mount Graham International Observatory is getting a new communication antenna to replace the one that's more than 10 years old. The new 40-foot mono-pole will offer scientists higher ...

SAFFORD - Wildfires on Mount Graham moved toward two mountain communities Sunday and continued to threaten an observatory that is home to some of the world’s most powerful telescopes. The fires have ...

PHOENIX — A troubled journey nears its end today with ceremonies dedicating what will be the world's most powerful optical telescope — some 20 years after its inception. Even now, the University of ...

An observatory on southern Arizona's highest mountain peak is reopening for public tours for the first time since March 2020, when they were paused because of the COVID-19 pandemic. Tours of Mount ...