Question: have some sense that in a space time with metric [tex]ds^2 = g_{tt}dt^2+ g_{xx}dx^2+ g_{yy}dy^2+g_{zz}dz^2[/tex], the coordinates [tex] x,y,z \in ]-\infty, \infty[ [/tex] , but [tex] t \in [0, \infty[ [/tex] ??????(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Range of time

**Physics Forums | Science Articles, Homework Help, Discussion**