- Charon is being considered as a dwarf planet because its orbit makes Pluto wobble. Why? https://www.youtube.com/watch?v=xcTFIuls2oE 5 comments askscience
- Over 10 years ago, Pluto was demoted to a dwarf planet. Now, one Johns Hopkins astronomer is pushing to redefine what we consider a massive planet. http://www.astronomy.com/magazine/press-releases/2018/01/astronomer-proposes-new-definition-of-a-planet 5 comments space