A new analysis of the sky has finally confirmed where the missing half of the Universe's visible matter has been hiding.

Zhúlóng is the most distant spiral galaxy ever seen. It formed 1 billion years after Big Bang, yet has a calm structure like ...

Mysterious dark matter makes up 85 percent of matter in the universe, and of the remaining 15 percent, scientists couldn’t account for half—until now.

Scientists using the James Webb Space Telescope have identified an ancient and faraway galaxy that provides evidence that an important transition period that brought the early universe out of its ...

The halo is more extended that astronomers originally thought, and contains enough hydrogen gas to resolve the problem of the ...