Half of the universe’s ordinary matter is missing, astronomers say they’ve found it in a vast hydrogen cloud
Ordinary matter, the atoms that make up stars, planets, and living things, make up only about 15% of the total matter in the universe. The rest is thought to be due to dark matter, but it has not been directly detected. However, more than half of that 15% remains unexplained, leaving gaps in cosmological models. … Read more