Black Hole, Milky Way and Sagittarius A

A new study using NASA 's James Webb Space Telescope has revealed a variety of light coming from the black hole Sagittarius A* — or rather its accretion disk, the ring of rapidly spinning material ...
A mysterious, one-off flash of energy from an unknown object outside the Milky Way has left astronomers puzzled. The research ...
In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...
The supermassive black hole at the center of the Milky Way appears to be having a party—and it is weird, wild and wonderful.
Arizona's dark skies are a haven for astronomers and photographers. Some communities are fighting to keep them that way.