We are told space is infinite, but the part humans can actually see is trapped inside a cosmic bubble about 93 billion light-years across. At the edge of that bubble is not empty darkness, but ancient ...

Scientists have discovered a galaxy as it was 13 billion years ago, 800 million years after the Big Bang. It contains possible evidence of the universe's first stars and is one of the most chemically ...

Galactic filaments are the largest known structures in the universe — vast strands of galaxies and dark matter stretching across unimaginable distances. They form what scientists call the cosmic web, ...