undefined | Better HN

0 pointsumvi5y ago0 comments

I don't think that is quite right. If you travelled near the speed of light and then slowed down again it would look (from your perspective) like you jumped 10 years into the future. So high gravity environments "moving slower" shouldn't result in a jump to the future upon exit.

Instead I think what is happening is that massive objects actually stretch the fabric of spacetime somehow so that the closer you are to the object, the slower you travel through both space and time. And the more massive the object, the more stretched space and time become as you get closer to it.

Hence if you go near a very massive object, from an outside observer it looks like you are frozen in time because time is so stretched it takes forever for you to move through it.

As you mentioned though, from any given frame of reference time will always feel the same. 1 second will always feel like 1 second.

0 comments

vecter5y ago

> the slower you travel through both space and time

No. You are always traveling at a constant velocity through spacetime.

[0] Spacetime: https://en.wikipedia.org/wiki/Spacetime

umviOP5y ago

Ok then in that case I think of it as massive objects tend to compress space the closer you get to them. So though your velocity is constant, you are travelling through more space the closer you get to a massive object (since the space is now compressed) which means you are travelling through less time (in order to maintain same velocity).

j / k navigate · click thread line to collapse