- #1
us40
- 29
- 0
Hello,
According to Stephen Hawking no boundary condition universe does not have any boundary in space time.If it is so then it is like earth.You can not go north to north pole.Earth does not have any edge or boundary.So universe is like closed structure like earth.Means after some times it collapse on its own and expansion stops.But acceleration of expanding universe suggest that universe may be expand for forever and that is open universe.So does it imply that universe had in past(before plank epoch) boundaries for space and time?
According to Stephen Hawking no boundary condition universe does not have any boundary in space time.If it is so then it is like earth.You can not go north to north pole.Earth does not have any edge or boundary.So universe is like closed structure like earth.Means after some times it collapse on its own and expansion stops.But acceleration of expanding universe suggest that universe may be expand for forever and that is open universe.So does it imply that universe had in past(before plank epoch) boundaries for space and time?