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Flat, closed and open universes

Flat, closed and open universes

R980/0206

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Credit

MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY

Caption

Flat, closed and open universes. Artwork showing the geometrical curvatures of a 'flat' (left), 'closed' (centre) and 'open' (right) universe. The galaxies are shown on a curved grid, which represents the overall geometry of the universe. The universes have planar, spherical and saddle curvatures respectively. The curvature of a universe is determined by the amount and density of matter and energy. In an open universe, the amount of matter is insufficient to prevent the universe expanding forever. In a closed universe, there is enough matter to halt the expansion, followed by a contraction to a Big Crunch. In a flat universe, the amount of matter has a critical value between these two extremes.

Release details

Model release not required. Property release not required.

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