Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why ...

From Lowell Observatory to Kitt Peak to Mount Graham, here are the 11 best planetariums and observatories in Arizona and ...

Space exploration missions have revealed that polar vortices aren’t uncommon beyond Earth. They’ve been observed throughout ...

Perhaps the best known of all comets is Halley, correctly pronounced so that it rhymes with rally, not daily. It is named after the 17th-18th century astronomer Edmond Halley. This ...

Join award-winning filmmakers Katja Torneman and Peter Blystone for a fundraising event at Snow Mountain River (SMR) in conjunction with Earth Day 2025. On April 22, three captivating wildlife ...

Shadows sharpened, daylight dimmed to dusk and a hush fell over millions of onlookers as the moon slid perfectly between Earth and the sun ... from around the world. Arizona was not in the ...

Thirty-five years ago, the Hubble Space Telescope was launched into orbit. It's been sending back galactic data and images ...

An analysis of two decades of data from NASA's Hubble Space Telescope has provided fresh insights into the complex atmospheric changes on Uranus that are largely driven by the effects of the sun's ...

David Rankin, an operations engineer for the University of Arizona's Catalina ... the probability of YR4 striking Earth changed so dramatically. He told The Sun: “When we are trying to foresee ...

PHOENIX (AP) — The case of Lori Vallow Daybell took investigators from Arizona to Idaho and Hawaii ... close and that Cox believed he was put on Earth to serve as her protector.

This is how the last major asteroid to hit Earth slipped through through the net. It went "completely undetected, because it came from the direction of the Sun", Luca explained. He is referring ...