5.6K views · 103 reactions | On the anniversary of Pluto's discovery, here are five things you might not have known about the dwarf planet  | Reuters | Facebook

75K views · 617 reactions | Many people still don’t understand why Pluto was reclassified as a dwarf planet in 2006, including four-year old Charlie. Here, leading astrophysicist and Academy Fellow Professor Elaine Sadler explains Pluto's planetary demotion. | Australian Academy of Science | Facebook

26K views · 506 reactions | Did you know this about Pluto?   "Why is Pluto no longer a planet? Pluto was reclassified as a dwarf planet in 2006 by the International Astronomical Union because other objects might cross its orbit." : science.nasa.gov/dwarf-planets/pluto | Sphere | Facebook