Well, it looks as though Pluto may not be the last stop on the way out of our solar system after all. New information from the journal Monthly Notices of the Royal Astronomical Society Letters tell us that a couple of extreme trans-Neptunian objects (ETNOs) are most likely inhabiting the area beyond the orbit of our beloved dwarf-planet. The Guardian states that two planets as big as Earth may be edge lingering on the edge of the solar system.
- Over at Space.com, senior writer Mike Wall’s article Mysterious Planet X May Really Lurk Undiscovered in Our Solar System does a good job of explaining the importance of this topic.
- The Orbit Simulator gives users an idea of the relative speed of planets as they revolve around the Sun.