Milky Way

15/08/2021
NASA/JPL-Caltech/R. Hurt (SSC/Caltech)
NASA/JPL-Caltech/R. Hurt (SSC/Caltech)

The Milky Way is a barred spiral galaxy. Part of it can also be seen from Earth as a band, because the Solar System is in the Milky Way galaxy. If our system is 4.6 billion years old, then we can tell you that this galaxy is approx. 13.7-13.8 billion years. If we were to take the entire galaxy, even its hard-to-see edges, we could say that our galaxy is about 170 billion light-years in diameter. It has somewhere between 100 and 400 billion stars and over 100 billion planets. As we have said in other articles, the Solar System is somewhere 26,500 light-years from the center of the galaxy on the edge of the Orion arm somewhere further inland. So it takes them somewhere at 240 million years to make a complete rotation, that is, since it has existed the Earth has done somewhere at only 18-19 rotations. The stars on its edge move much faster than those in the middle of it. The approx. it would be like distant stars moving with over 200 km / s. And the Milky Way is approx. that it travels at 600 km / s or more. Of course, there are stalled galaxies between the galaxies and the Milky Way has a few. We must first mention a chain of galaxy creation. The Milky Way is in the local group (a group of galaxies). The local group is part of the Super-cluster of galaxies in Virgo which is part of the Super-cluster of Laniakea.