question of age.

[bodhi]

with we travel in space shuttle with speed closer to that of light,when we come back to earth after few years there is significant difference between our age and people of that of earth.now how does that happen does the cells of human body mutate with the speed different than that of cells on earth????

[clem]

Nothing happens to your cells. You just have traveled a different distance in Minkowski
space-time than your earthbound twin.

[nitsuj]

the relative speed that the cells replicate is the same. called a frame. all physics is the same.

compared to the cells for dude on Earth, yea it was seemingly a different speed.

nothing (different) happens to the cells.

[Drakkith]

with we travel in space shuttle with speed closer to that of light,when we come back to earth after few years there is significant difference between our age and people of that of earth.now how does that happen does the cells of human body mutate with the speed different than that of cells on earth????

The closer you get to the speed of light, relative to someone else, the slower time will pass for you compared to that person. That's it. From your point of view time never passed differently, and in fact, until you slow down, you would think that time was passing slower for the other person.

[ZealScience]

It is a PHYSICS problem not a BIOLOGY one. As you travel at speed that approaches light you feel nothing different, but just seeing that surroundings are proceeding fast!

It also has something to do with curvature of space like the same effect from the gravatational field, not your DNA

[Passionflower]

with we travel in space shuttle with speed closer to that of light,when we come back to earth after few years there is significant difference between our age and people of that of earth.now how does that happen does the cells of human body mutate with the speed different than that of cells on earth????
In relativity when you travel between two events not only the spatial distance can vary but also the total travel time.

So the person who stands still on Earth has maximum travel time but moved a zero spatial distance while the traveler moved a spatial distance larger than 0 and had a travel time less than the maximum.

[ZealScience]

In relativity when you travel between two events not only the spatial distance can vary but also the total travel time.

So the person who stands still on Earth has maximum travel time but moved a zero spatial distance while the traveler moved a spatial distance larger than 0 and had a travel time less than the maximum.

So you mean the proper time in Minkovsky coordinate system. But I think Lorentz transformation is enough for describing this problem

[GrayGhost]

Bodhi,

So, are you and expert now?