A new model that incorporates data gathered by the JWST could help scientists understand the composition and mass of objects ...

A decades-old cosmic mystery may finally be solved. Scientists now suspect that the strange X-ray glow from a distant white ...

Since its discovery in Flagstaff, Pluto has become Arizona's favorite dwarf planet. Long believed to ... “This is not just about designating a state symbol; it’s about recognizing Arizona ...

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary status.