Hello Everyone! I have a question for better minds than mine. :) This pertains to speed through space plus speed through time always needing to equal the speed of light. I believe I've read that in order to add speed through space and speed through time, we would convert the two numbers to common units, by multiplying time by the speed of light. This sounds simple enough, but I can't figure out how to do it. (For example, which units would I use: Light years, years, miles per second, etc.?) I'm about as far from Sheldon Cooper as a person can get -- can't follow physics equations, symbols, etc. -- so I'm hoping someone would be kind enough to provide an example of the conversion process in the form of ordinary sentences. By the way, am I even correct about converting the two numbers to common units by multiplying time by the speed of light? And if so, would such a conversion be part of the Lorentz equations I've read about?