Lead author professor David Wiltshire says: 'Our findings show that we do not need dark energy to explain why the Universe appears to expand at an accelerating rate.'
This 'timescape model' takes into account the fact that time itself moves much slower in the presence of a gravitational field, such as the one around Earth.
Dark energy is commonly thought to be a weak anti-gravity force which acts independently of matter and makes up around two-thirds of the mass-energy density of the universe.
This theory works well to explain the cosmic microwave background radiation left behind by the Big Bang and the distribution of galaxies in the universe.
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