To ssdd Welcome to the kitchen. Wherever the observer is, time is constant. Relativity attempts to explain, among other things, the wacky phenomenon of how light bends due to gravity. Einstein at least formulated a mathematical explanation of this phenomenon while we still struggle to understand what gravity is and what light is. Hopefully his brilliance can be added to by young scientists like yourself willing to take as much heat as Albert had to to get us this far. If you can't get past Nereid, at least thank him for applying intellectual heat- the most compassionate type of heat, as BAUT is truly a user-friendly "kitchen."