# Gravity reaches across space and apparently reaches across time.

1. Jun 24, 2009

### keepitmoving

gravity reaches across space and apparently reaches across time. If it reaches into the past doesnt that cause some confusion for those who arent involved in the gravity event?

2. Jun 24, 2009

Staff Emeritus
Re: relativity

I don't know what "reaches into the past" could possibly mean, but I can tell you that whatever it is, gravity doesn't do this.

3. Jun 24, 2009

### keepitmoving

Re: relativity

i guess the way i said that sounded funny. I was referring to the
"warping" of time.

4. Jun 25, 2009

### Matterwave

Re: relativity

Matter warps space time, such that clocks move at different speeds when in different gravitational fields. This doesn't mean gravity affects things in the past...? I guess I don't really get what your question is...

5. Jun 25, 2009

### keepitmoving

Re: relativity

not being a professional physicist, i guess i use a simpler language. i was thinking that the warping of spacetime meant the warping of time as well. i used the phrase reaching back in time in a similar way to gravity reaching or warping space. and i was just wondering if that warping went backwards in time. In other words does the past still exist? I know it sounds sci fi, sorry.

6. Jun 25, 2009

### A.T.

Re: relativity

Warping means here that the distances are distorted. No idea what you mean by "reaching", but i don't think the same. Try to understand what terms actually mean, instead of inventing new synonyms for them, making it hard to understand you.
Depends what you mean by "past" and "still exist".

7. Jun 25, 2009

### keepitmoving

Re: relativity

A.T. - i appreciate the feedback. I know im guilty of over philosophizing physics. I should have used the words "effect the past" rather than "reaching back into the past".
I have read of some professional physicist speculating on this possibility however.
Do you think the past still exists and can it be effected.
By the way, i understand that a professional physicist cant go willy nilly on wild speculation for professional reasons. Being a relative amateur with nothing to lose however, i can.
Just searching for true physics here!

8. Jun 25, 2009

### diazona

Re: relativity

If the past still existed, it wouldn't be the past, it would be the present Seriously though, gravity doesn't do anything weird like "reaching back in time." An object cannot feel any change in gravity before the event that caused that change took place. (That's using a common-sense definition of "before")

Unfortunately, keepitmoving, I suspect that the simple language you are trying to use is just not precise enough to properly answer your question. I don't mean to sound insulting at all, it's just a fact that in order to really understand physics (such as gravity and time) you need to understand the math.

9. Jun 25, 2009

### A.T.

Re: relativity

Physics is the wrong place to search for truth. Try math.

10. Jun 25, 2009

### keepitmoving

Re: relativity

well, is the year 1856 still in existence? I know, i know, it`s a silly question.