When Is A Planet Not A Planet? UCLA Prof Suggests A Simple Test As discoveries of distant objects increase, we need a simple test to help define what is or isn't a planet, a UCLA scientist says. The current official definition works for our solar system but not for possible distant exoplanets, he says. by Jim Algar
China Launches World's Largest Electric Container Ship, Slashing 8,600 Pounds of Emissions per 100 Nautical Miles