Astronomers only understood what the Milky Way is when they discovered its infinite sisters and cousins in the universe at the beginning of the 20th century. This was made possible by the installation of telescopes equipped with photo chambers. It has been found that our galaxy measures about 100,000 light-years in diameter. Now scientists have discovered a mysterious glow in the Milky Way! Subscribe for more! ► https://bit.ly/2Q64mGd Credit: NASA, ESA, ESO, SpaceX, Wikipedia, Shutterstock, ... #TheSimplySpaceEN