How much younger are astronauts after they return from orbit?
When an astronaut returns home they will be 0.000023 seconds younger for each day they spend in orbit. For a one-year stay on the International Space Station, the returning astronauts will be about 0.0085 seconds younger. Not much to get excited about, but it is measurable on a good stopwatch if the experiment is set up correctly. http://www.nasa.gov/centers/kennedy/about/information/science_faq.html
Please login to answer this question. If you don't have an account, now is the best time to register for one!
