Hello dear friends, I hope everyone is well, this week's topic is very interesting because it arouses a lot of curiosity regarding dark matter, which to my understanding is an invisible and visible matter at the same time because you can only see or know when it is present when the lights of the stars flash or distort, this means that there is a good concentration of dark matter near or around them, This energy cannot be seen by solar microscopes from the earth or from a space station, only astronauts with advanced measuring equipment can detect dark matter, which in this case gravitational lenses are used to predict the dynamics depending on the masses of dark matter in terms of its direction and with this we will know what will be the behavior of the galaxies.