Read the article listed below and do a research for an essay about the possible new planet of our solar system.
The essay should address the following issues:
1. the current definition of a planet (is this the reason that Pluto got disqualified?)
2. the data/evidence lead Dr. Brown and Dr. Batygin to the “planet X” (list a part of their mathematic calculation),
3. what makes the “new planet” qualify to be a member of our solar system?