Do you age slower in space?

[the truth]

I read this somewhere?
the HD40307g planet that is the most similar to earth is 42 light years away, but if we created a space ship that travelled at the speed of sound it would take 42 years one way. However, if we sent a human, Ive read we age at half the rate in space which would mean the astronaut would only age 21 years? could it ever be possible we could actually send a spaceship accurately to land 42 light years away? let alone a human being?

[King Gizzard]

Funny you should say that, I'm going to see my Uncle on Pluto next week, I'll get back to you.

[Marcus.]

i think so

[CharlieO]

I dont see why, there is no ozone to protect against uv rays which age you

[Nedusa]

Yes when compared to an observer stationary on Earth due to Einsteins special theory of Relativity and an effect called time dilation.Time dilation would make it possible for passengers in a fast-moving vehicle to travel further into the future while aging very little, in that their great speed slows down the rate of passage of on-board time. That is, the ship's clock (and according to relativity, any human traveling with it) shows less elapsed time than the clocks of observers on earth. For sufficiently high speeds the effect is dramatic.For example, one year of travel might correspond to ten years at home.