International astronomers said Monday they have created the largest map of dark matter ever observed in the universe, using data from potent telescopes that scanned 10 million galaxies.
The mysterious substance is believed to make up about a quarter of the universe, but its nature is a puzzle because it can be detected only indirectly through the gravitational pull it exerts on visible matter.
To make the new map, astronomers studied how light emitted from galaxies is distorted as it passes by big clumps of dark matter in its travel toward Earth. |