News Space Saving the Earth with dynamical simulations Model suggests how protoplanets kept a safe distance from the sun By Lisa Grossman January 8, 2010 at 6:06 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print A new model keeps the solar system safe for the young Earth and other infant planets by preventing them from spiraling into the sun. When astronomers simulate the formation of the solar system, disaster strikes: no planets survive.