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Space & Planetary Science

Defining Stars and Planets: Does Size Matter?

By Keith Cowing
NASA Watch
June 13, 2008

Reader note: “Check these two images out. They show the range in size of “planets” in our solar system, and some well known “stars”. One might ask, given on the size range, if Pluto isn’t a “planet”, why would the Sun be a “star”?”

Images below

NASA Watch founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber.