A star like the Sun lives modestly for billions of years, converting the nuclear fuel in its core into energy that ultimately escapes as light and heat. But the most spectacular phase of a Sun-like ...

Fly about 2,600 light-years to Hubble Space Telescope imagery of the Cygnus loop nebula. See images from 2001 and 2020.

The universe is a slow-changing place. While it's mostly true that the heavens and the deep-sky objects in it will look ...

Sagittarius unveils stellar wonders, from the Lagoon and Trifid Nebulae showcasing the Milky Way’s breathtaking cycle of ...