A hypothetical kind of matter dark matter has been a matter of research since a long time. It is not possible to see the dark matter with telescope. A new study suggested long filaments of dark matter exist.

Astronomers know more than one-fourth of all matter in the universe is made of dark matter. The regular matter that is visible has made just 5% of the universe. The rest part is dark energy, which has been baffling scientists from a long time. Currently, there is no way to detect dark energy or dark matter, although a number of studies tried to unlock the mystery in the past.

The study published in the Astrophysical Journal by Gary Prézeau of NASA's Jet Propulsion Laboratory proposed that dark matter exists. Scientists have observed that dark matter is cold, which means it doesn’t move much and doesn’t make any interaction with light.

Fluctuation in the density of dark matter is the reason behind the creation of galaxies, a system of millions or billions of stars made of ordinary matter. Both, ordinary and dark matter, coexist in the universe due to gravity, which holds them together.

Calculations in 1900s and simulations in last 10 years have revealed that dark matter is behind the formation of fine-grained streams of particles that moves with same velocity. “A stream can be much larger than the solar system itself, and there are many different streams crisscrossing our galactic neighborhood”, as per Gary Prézeau.

Prézeau said when a stream of dark matter goes through a planet, particles focus on an ultra-dense filament of dark matter.