If you're seated while reading these words — as I am writing them — you're most likely convinced that you and the room around ...

The image of supermassive black hole Sagittarius A * was created using data from the Event Horizon Telescope Collaboration.

The universe's first galaxies were hot messes, according to a recent study. During their younger days, they were wild, chaotic bundles of turbulent gas, churned up by huge gulps of intergalactic gas, ...