Think of Space as a stage on which all things take place now adding time as dimension means we can see what happens to this in different instances of time like say the present as the base line the future and the past in opposite directions now what Einestien discovered is that when things go through this space time they experience the world differently so someone can have 3 years pass for them and others 6 years or someone can run 3 metres from one perspective but only 1 and a half from thier own. Additionaly the space time stage can be molded or changed depending on how many things are in it making a further difference in how different perspectives see the world. There is no limit to how many dimensions of time you take humans can only observe one in which the past and future exist but there can be more just not ones we know anything of.
Cephlaspy t1_j3m3ugg wrote
Reply to Can someone explain what spacetime is? by Dusthip
Think of Space as a stage on which all things take place now adding time as dimension means we can see what happens to this in different instances of time like say the present as the base line the future and the past in opposite directions now what Einestien discovered is that when things go through this space time they experience the world differently so someone can have 3 years pass for them and others 6 years or someone can run 3 metres from one perspective but only 1 and a half from thier own. Additionaly the space time stage can be molded or changed depending on how many things are in it making a further difference in how different perspectives see the world. There is no limit to how many dimensions of time you take humans can only observe one in which the past and future exist but there can be more just not ones we know anything of.