Add Yahoo as a preferred source to see more of our stories on Google. This NASA image shows two massive galaxy clusters previously captured by NASA's James Webb Space Telescope and Chandra X-ray ...

A new high-resolution map of distant galaxies may help scientists understand a mysterious invisible substance that helps hold the universe together. The ordinary matter all around us — stars, planets ...

For all the impressive maps astronomers have made of the distant universe, much of the action has stayed out of sight. The brightest galaxies were relatively easy to chart. The faint hydrogen glow ...

NEW YORK — A new high-resolution map of distant galaxies may help scientists understand a mysterious invisible substance that helps hold the universe together. The ordinary matter all around us — ...

This NASA image shows two massive galaxy clusters previously captured by NASA's James Webb Space Telescope and Chandra X-ray Observatory, with areas of possible dark matter in blue. (NASA via AP) ...