As of the moment, there are a total of nine plants that we know. However, this does not mean that this number could go up or go down. In fact, we excluded the ninth planet before, but re-acknowledged it a few months ago.
Now, astronomers said that they have detected an exoplanet that comes with a ring, by which its size is 200 times larger than the ring around the planet Saturn. This exoplanet is also considered to be the very first one to be found outside the solar system.
According to Eric Mamajek, he and his team discovered this large ring way back in the year 2012.