# Big Bang, blackholes and time

1. Dec 30, 2007

### scupydog

Hello all, After reading about how time began at the moment of the big bang and how time ends in black holes, if there was only 1 big bang and many black holes, would times be decreasing i.e. slowing down. Any thoughts would be appreciated , thx

2. Dec 30, 2007

### DaveC426913

It might be more accurate to say time "breaks down" in black holes, though we don't really know what happens inside a BH. Time "ending" in a BH is not really the counter-equivalent of time "beginning" at the BB.

3. Dec 30, 2007

### scupydog

thank you for your reply. If there is a begining of time is there not an end of time.

Last edited: Dec 30, 2007
4. Dec 30, 2007

### Bright

Time starts in Big Bang.
Then time splits. This means world lines split.
Then world lines usually goes to infinity, but some of them ends in black holes.
There is NO the same time for ALL observers!

5. Dec 30, 2007

### DaveC426913

WEll, time might end with hte heat-death of the univerese, when the entire universe's nergy and matter are distiibutred evenly, or it might end in a "Big Crunch" - the reverse of a Big Bang.

6. Dec 30, 2007

### scupydog

Thank you that makes senseish stuff, I'll think about that, good night all

7. Jan 1, 2008

### muccasen

Time Eh?

What do you think of this [remember the forum rules, lol]?

Scenario: Big Bang, space expands, time increases.

Apparently simple but let's check it out

Spatial expansion is 3d in a 4d embedding space. This means we need to take the balloon analogy where space is the surface of an expanding balloon. NB the two dimensional surface represents the 3d space we exist in. OK so as the balloon gets bigger space increases.

Time also was created yes? How? How did it relate to the space? Is it not easy to accept that time also probably expanded from a point? Can we think of time as the radius of the balloon? As space moves outward the radius increases. At "c"?? Lol. when inflation is occurring? Yup "C"... IMHO - explain if you ever debate that far.

So anyway a radius for time direction. Note a positive direction for time has an equal opposite direction that is also positive. Apparently then time is always positive even when it points in an opposite direction! It would seem then that time is a PROCESS rather than a dimension even if it acts always at 90 degrees to the spatial directions of an observer. That is acts within an additional dimension to the 3 spatial dimensions of an observer.

However, the embedding 4d space (where any direction could be time) is modified by the BIg Bang. The BB expansion defines the direction of time for any given location within the universe. Obviously this becomes modified by rotation where speed is involved i.e. actual movement relative to any radial line from the BB origin.