Planet Earth seen from space. Image by NASA
How big can a planet be? Astronomers propose a limit for defining planets - space news

New planets are discovered regularly in the last years. However, there is an ongoing scientific debate about how to define a planet. Astrophysicist Kevin Schlaufman published a paper that might settle the dispute. He argues that a planet can not have more than 10 times the mass of Jupiter. This upper limit may help distinguish newly discovered planets from brown dwarfs. The new approach proposes to consider celestial bodies in excess of 10 times Jupiter mass as brown dwarfs. Off course, are factors are important also such as the chemical composition of the bodies or the type of neighbors they may have.

Read the full story: http://www.valuewalk.com/
Scientific publication: http://iopscience.iop.org