Although this book began as a simplification of theory according to its historical development, a slight modification of relativity theory was eventually discovered. Einstein initially opposed Blackhole theory, but his alternative was only äpossible counterforce¿by means of¿calculous integration. It was rejected due to the discovery of redshift of starlight per distance that¿indicated¿an expanding universe consistent with a Doppler principle. It became assumed all the mass in the universe began as a small speck much smaller than the electron. What Einstein did not do was explain how internal energy can be contained, and the containment radiation is contrary to the Doppler principle.¿By the Higgs mechanism, light can be either massive or massless. It is massless or massive analogous to ocean waves passing over the surface do not change momenta unless something else is in the way. Superimposed waves are internal mass energy in the sense their interaction with outside containment waves is of twice kinetic energies reflecting in opposite directions. More energetic waves can also pass through invisibly undetected. Another explanation of the redshift in starlight per distance has been Tired-light theory whereby slower light entering a medium of denser containment partially reflects outward and partially reflects the medium inward analogous to vacuum effect. Light thus simply converts to gravity.