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Scott Kelly's ageing 'slowed down in space'

TrendingBy Sunday World
Astronaut Scott Kelly
Astronaut Scott Kelly

Nasa astronaut Scott Kelly is younger than he would have been had he stayed on Earth.

He is officially 1/100 seconds younger than he would have been had he stayed at home, according to Neil deGrasse Tyson, the American astrophysicist.

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.

"It's called time 'dilation' because you can think of the moving person's time as having 'expanded' (dilated) since less time passes for them than for us."