NASA plans to fly two rockets through active auroras and study the unique ribbons of light that dance across the Alaskan ...

Birdwatchers and hunters flock to southeast Arizona each winter to witness the feathery phenomenon while it lasts.

Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even ...

A retired Tucson heart doctor won a national amateur astronomy award for helping University of Arizona scientists detect some ...

Early 2025 is a good time for skygazing and spotting up to seven planets in the night sky – if you have a little help.

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

Astrophotographers use sophisticated imaging technology to take and edit photographs that bring us the cosmos with startling ...

Skywatchers can spot Venus, Saturn, Jupiter and Mars in the night sky with the naked eye, but two other planets might need a telescope to be seen.

A solar explosion called a coronal mass ejection is poised to graze Earth on Friday or Saturday (Jan. 24 or Jan. 25), ...

The young protostar T Tauri is about to be eclipsed by a huge disk of gas and dust that could prompt the star to fade or even disappear.

The case of mistaken identity was quickly resolved, but astronomers say it shows the need for transparency around craft in ...

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...