Scientists think they know where the dark matter of the early universe is hidden

According to foreign media reports, most of the matter in the universe is made up of a substance we have never seen before. It is called "dark matter", and although it is very rich, the study of dark matter is very difficult. Calculations from decades ago show that from the early days of the universe, dark matter around young galaxies is more than ancient galaxies, but where do the dark matter we see today come from? A new study provides the answer.

Past research has shown that the galaxies we see nearby have more dark matter than distant galaxies. Scientists believe that there may not be as much dark matter around those ancient galaxies. But new research proves that this is not the case. After studying about 1,500 galaxies, a research team led by Durham University's Alfred Tiley has determined that the amount of dark matter around these giant stars and planets is about the same.

Detecting dark matter around a galaxy can be tricky, but it can be easier by calculating the gravitational effects of matter on the surrounding environment. We can't see dark matter in space because it doesn't reflect light, but it still exerts gravity, just like a "normal" substance. By considering the size of the galaxy and the speed at which stars move on the edges, scientists can calculate the extent to which dark matter lurks at the edges.

In the latest round of research, scientists applied the same formula to hundreds of young and ancient galaxies. Scientists now believe that there is little difference in the amount of dark matter around ancient galaxies compared to younger galaxies.

However, as Live Science reported, the astronomical community did not fully accept this new discovery. The models used by Tiley and his team have been questioned, especially because it is related to the measurement of high-quality galaxies that have been studied by others looking for dark matter.