Galaxy filaments are large structures in the universe that snake around the universe in a web. They were created during the Big Bang, when hydrogen gas in the universe broke into pieces. Galactic filaments are so big that more than half of all of the regular matter (formed of neutrons and protons) is contained within them. Between these filaments lie galaxies.
Now, scientists from the University of Bonn in Germany have discovered a galactic filament that measures about fifty million light-years long.The filaments are so large that it is almost impossible to spot the particles that make them up. However, the scientists used the eROSITA telescope. This telescope can detect different types of X-ray radiation and can take large pictures of the sky at a time.