Thank you to all those who replied. At the top of the article you linked there's the: "This article is about time dilation due to relative gravity. For time di

Thank you to all those who replied. At the top of the article you linked there's the: "This article is about time dilation due to relative gravity. For time dilation due to relative velocity, see Relative velocity time dilation." I didn't know there were "two forms" of time dilation, knowing what to search for helps a lot. Thanks again.