NASA's next big eye on the cosmos is now fully assembled. On Nov. 25, technicians joined the inner and outer portions of the Nancy Grace Roman Space Telescope in the largest clean room at the agency's ...

Two Micron All-Sky Survey (2MASS) imagery was used to create a animation of the warp of the Milky Way galaxy. Credit: 2MASS, ...

The galaxy's discovery challenges our understanding of how galaxies were formed in the early period after the Big Bang.

The galaxy – seen as it appeared when the Universe was just 1.5 billion years old – shows a mature, organised structure at a time when most early galaxies were believed to be irregular and chaotic, ...

A spectacular new view of two dwarf galaxies caught in the middle of a cosmic collision reveals a glowing gas bridge, streams of newborn stars and the ongoing gravitational tug-of-war reshaping both ...