Part 2 in our Dark Energy series.
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Now that we know the universe will continue to expand forever, we can begin to complete the first Friedmann equation, and determine the shape and geometry of our universe. At first glance, it would seem that the equation doesn’t quite add up, and that our universe is a hyperbolic plane. But when we add in the cosmological constant, the equation balances out, and we return to a flat universe.
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Why the Universe Needs Dark Energy
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Dark energycosmological constantFriedmann equationEinsteinPhysicsPBS space timespacetimescienceeducationMatt O’DowdPBS digital studiosAlexander FriedmannAlbert Einsteingeneral relativityeinstein field equationsexpansionuniverse expansionspaceastrophysicsfate of the universeuniverse geometryshape of the universethe big crunchthe big bangdark matterwhat is dark energy
