Our sun is classified as a G2 medium-sized star. We believe it’s about four billion, 600 million years old, halfway through its lifetime. It burns four million tons of hydrogen every second. The sun ...

Phoenix received a $1M grant to address extreme urban heat. Here's where to see the innovative shade structures 11 artists built in public parks.

For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar ...

A 1970s proposal would have brought a 600-foot, neon saguaro cactus tower to Papago Park. Here's why it was suggested but ...

No telescope has basked in the night sky quite like this before. Here's what it could reveal about the universe.