Home > Space > Why Do The Planets Orbit In A Plane? Why Do The Planets Orbit In A Plane? Space Share on Pinterest Within about 10 degrees the planets in our solar system orbit in roughly the same plane. So why does that happen? Why did our solar system (and Milky Way) turn out flat? Share on Pinterest Related Posts VFX Artist Show The Scale Of Stars To Objects On Earth Why Do We Go to Space? Top 10 Facts – Space [Part 6] Five Real Possibilities For Traveling To Other Solar Systems Interesting Facts About The Planets In Our Solar System