Nasa astronaut Scott Kelly must be over the moon to be home, but there’s more good news – he’s younger than he would have been had he stayed on Earth. Kelly received countless ‘welcome home’ messages on his return from the International Space Station on Tuesday.
But one message, from a astrophysicist, stood out. Neil deGrasse Tyson says Kelly is officially 1/100 seconds younger than he would have been if he hadn’t bothered rocketing into orbit.
After almost a year in space, deGrasse Tyson says Albert Einstein ‘s theory of relativity and the time-dilation effect shows that time will have passed more slowly. Now, Dr Jeffrey Bennett, a Colorado-based astrophysicist and author of the 2014 book What is Relativity?, has backed his claim.
He told the Huffington Post: “Relativity tells us that when we (in this case meaning all of us on Earth) observe someone/something else that is moving relative to us (in this case the International Space Station ), we will see time running slower for the moving people/things. Read more