Astronomers are baffled by a one-off flash of energy from an unknown object outside the Milky Way. Researchers from Stanford University scoured through decades-old data from the Chandra X-ray ...

The image captures HE0435-1223, one of the best lensed quasars, with four bright images formed by a foreground galaxy. This gravitational lensing effect creates a stunning celestial arrangement. The ...

The supermassive black hole at the centre of our galaxy, the Milky Way, although not as "voracious" as others on the fringes ...