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Retired NASA astronaut Harrison Schmitt told an audience of space exploration enthusiasts that "maybe it’s time to take another walk on the moon" during a presentation at the Starmus Festival at the Norwegian University of Science and Technology (NTNU) in Trondheim, Monday.
Astrophysicist Adam Riess set out to explain how supernovae "reveal that we live in a universe that is not just expanding, but actually expanding faster and faster" as a result of what he described a "mysterious new component of the universe that we call dark energy."
Theoretical physicist Brian Greene gave an overview of Albert Einstein's theory of special relativity using the example of the moon and Earth's orbit. "The moon is kept in orbit because it’s rolling along a valley in the curved environment that the Earth creates" Green explained, adding "that is how the force of gravity is communicated from place to place and if you pull back, you see that the Earth is kept in orbit for exactly the same reason, rolling along a valley in the curved environment that the Sun creates."
The fourth Starmus Festival, which celebrates astronomy, space exploration, chemistry, physics, art and medicine, will run from June 18 until June 23.



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