Astronomers have spotted an unexpectedly hot galaxy cluster in the early universe that's challenging theories of galactic evolution. The scorching cluster existed just 1.4 billion years after the Big ...

There's been a lot of concern lately about how much these newfangled satellite constellations will ruin ground-based astronomy. Passing satellites leave streaks of light pollution on an observatory's ...

Using the Whole Earth Blazar Telescope (WEBT), an international team of astronomers have performed long-term photometric observations of a luminous blazar known as Ton 599. Results of the observations ...

Each spring, amateur astronomers attempt the ultimate stargazing challenge—an overnight quest to spot every galaxy, nebula, and star cluster in Charles Messier’s famous catalog. Photographer Alan Dyer ...