Planets similar to the size of Neptune don’t orbit too closely to their stars because they would lose their atmospheres. But scientists recently discovered an exoplanet 900 light years away, a bit smaller than Neptune with 20 masses of Earth orbiting super close to its star, or sun. The unusual circumstances surrounding the planet led scientists to dub their new find, The Forbidden Planet, and gave them hope to understanding how solar systems evolved. The research also bodes well to discovering successful techniques for exploring and eventually colonizing Mars. Find out more in this episode of SciShow Space.