• Question: How do we know there are just 9 planets (including Pluto) in our Solar System? What if there are more?

    Asked by Space Star!! to Anne, Beth, COLFlight, Jon on 15 Oct 2015. This question was also asked by spacegirl.
    • Photo: Beth Healey

      Beth Healey answered on 15 Oct 2015:

      Hi Space Star!

      Nothing is ever sure but these are the only ones we have found so far! The telescopes we have are very sophisticated and can see our solar system clearly so it is unlikely we have missed one but of course, not impossible 😉