I’m not too sure about what your asking about but I guess your asking about exoplanets. There are planets which have been found orbiting other stars. Some of these planets are quite similar to Earth and could have life on them!
NASA announced the discovery of a new planet just the other day. They’ve given the catchy name of Kepler-1647b. I think it happens fairly often. I don’t know if they’ll ever discover another planet that also orbits our sun. There could be one further out than Pluto though and we just haven’t found it yet.
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