Alien life spread Alien life spread Currently we have thousands of proved exoplanets and it looks like most of stars have planets, even neutron stars do. But proved exoplanets generally are inside 1000 light years distance from the solar system. Can we suppose that other parts of our galaxy are the same? According to current knowledges it looks rather doubtful especially about the center of the galaxy. It looks extremely important that the region wouldn't exposed to strong gravitational waves to make planets to be able to form and espcially to be habitable. In a galaxy center can exist a lot of black holes that will cause gravitational storms and even if it won't hinder planets to be formed such planets will have seisms constantly and huge amount of volcanos. Also black holes and neutron stars may cause powerful X-rays that may blow off planets atmospheres. But not only a galaxy center may have powerful enough gravitational waves to cause such cataclysms. Solar system d