A blob of gas seen outside the Milky Way could be a type of starless, dark matter–dominated galaxy. Some scientists are skeptical.

China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province.

The Perseverance rover has discovered an extraordinary rock on Mars, featuring a surprising structure that remains a mystery to scientists studying the Red Planet. While exploring the area around ...

An aerial photo of the Five-hundred-meter Aperture Spherical Radio Telescope (FAST ... his understanding of astronomy was relatively limited before joining the team. Through his experience ...

Crawford has assumed a working knowledge of spherical astronomy. He develops his subject concisely, and leaves the more difficult subjects of perturbations and definitive orbits for later and more ...