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Harvey, Alex – European Journal of Physics, 2009
The recently observed acceleration of the expansion of the universe is a topic of intense interest. The favoured causes are the "cosmological constant" or "dark energy". The former, which appears in the Einstein equations as the term [lambda]g[subscript [mu]v], provides an extremely simple, well-defined mechanism for the acceleration. However,…
Descriptors: Energy, Science Instruction, Physics, Equations (Mathematics)

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