Einstein’s theory of relativity: Star Wars twins Luke Skywalker, Princess Leia have an age gap

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Published: August 24, 2015 8:30:52 PM

Star Wars twins Luke Skywalker and Princess Leia would actually be different ages due to Einstein's theory of relativity, with Luke being 1.75 years younger than Leia, researchers, including one of Indian-origin, have discovered

Star Wars twins Luke Skywalker and Princess Leia would actually be different ages due to Albert Einstein’s theory of relativity, with Luke being 1.75 years younger than Leia, researchers, including one of Indian-origin, have discovered.

In the original Star Wars trilogy, one of the big revelations is that main characters Luke and Leia are actually twins separated at birth.

Duleep Vasudevan, Tom Griffiths, Mark Phillips and Katie Herlingshaw from the Department of Physics and Astronomy at the University of Leicester have worked out that in the film Star Wars Episode V: The Empire Strikes Back, Luke and Leia do not actually remain the same age due to relative velocity time dilation – Einstein’s theory of relativity – which results in time ticking more slowly on an object that is moving at a higher speed.

The calculations made were based on the twins’ journeys to Cloud City. Leia travels from the neighbouring system of Anoat, while Luke travels from the much more distant planet Dagobah. Luke’s journey was estimated to be 25 times longer than Leia’s.

Additionally, as Leia travels in the Millennium Falcon, a much larger ship with more powerful engines than Luke’s X-Wing Starfighter, the students assumed that it reaches a higher speed.

Leia’s journey yields a time dilation of 62.6 days; however Luke experiences a time dilation of 700.8 days (1.92 years).

The students concluded that Luke is therefore 1.75 years younger than Leia, possibly rendering them the first twins ever to have over a year between their ages.

In another scenario, the students considered gravitational time dilation – the slowing of time due to gravity. Cloud City, a mining station, floats above the clouds of the planet Bespin, a gas giant very similar to Jupiter.

An observer at a distance far from the planet would see time pass more quickly than an observer on the surface.

“For Luke to become the same age as Leia he would have to orbit the gas giant for 9.77 million years,” said study lead author Thomas Griffiths.

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