Revolution in our solar system
A recent science news item has caught the imagination of public: astronomers hypothesize the existence of a hitherto unseen planet that might be lurking in the vast space beyond Neptune. There are thousands of small icy bodies that stretch out beyond the orbit of Neptune from a distance of 30 AU all the way to 500 AU. They are known as the Kuiper Belt Objects (KPO). In recent years, astronomers have found that a few of these KPOs are clustered in a particular part of the solar system in a way that has a low probability of occurrence.