The question of how do we know the Milky Way is a spiral galaxy has been debated by both amateur and professional astronomers for many years. It is possible to measure the movement of stars within this galaxy, but we don’t have the technology to actually see these objects directly. One way that we do know how do we know the Milky Way is a spiral is because of the satellites that orbit around the solar system. These small satellites follow the orbit of the sun around the galaxy and they give us a very detailed picture of the stars and gas clouds that make up this system.
If we are to believe all of the theories and models of how do we know the Milky Way is a spiral then we have to also believe that the gas in our universe is arranged in a particular way so that our galaxy must be a spiral as well. We can test this theory using instruments on the space station called the MASTar, or Mars analog telescope. These instruments take images of the stars at different times of each year and they will allow us to see if our theory about how do we know the Milky Way is a spiral is correct. Even though there are some problems with this theory, there is no doubt that it can be used to study this gas cloud.
There are several other theories out there on the problem of how do we know the Milky Way is a spiral. Some of them have a much better accuracy than others. However, the data that is available gives most scientists a good idea about this matter. All you have to do to find out how do we know the Milky Way is a spiral is to start your search online and you will soon find out for yourself what the answer is.