Five years ago today, a comet came from somewhere else and orbited our Sun and disappeared. This was a big shock because it was the first time a comet had been detected in another solar system. Some people even thought that it was not a comet but a spacecraft. But the astronomers assured that it was a normal comet. It was a little strange, but it was a comet without a tail because its material had evaporated. But it is the first object that came from the solar system. The name of this come't is Oumuamua.