Ceres

story: Ceres has recently been laughing really loud in the asteroid belt, Mars is obviously too scared to check it out, Earth could care less, Venus is still debating going in there because it's so off his orbit, Mercury's worried that whoever's laughing is too big compared to him and might hurt him if it's dangerous, which is why Mercury hasn't gone in. Saturn, being the sensitive one he is, is a little scared of what could possibly be in there, and Jupiter is too busy reading his books to check it out himself. Uranus and Neptune haven't been informed of it, because their ice giants! ice giants don't get to know what's going on in the inner part of the solar system!