Even with an entire universe to explore, our own solar system is still full of mysteries. Welcome the newest members of our space family, found only recently in the "no man's land" beyond Neptune.
원문출처 : http://www.cnn.com/2016/08/30/health/planet-nine-extreme-objects-solar-system/index.html
원문출처 : http://www.cnn.com/2016/08/30/health/planet-nine-extreme-objects-solar-system/index.html