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Astronomy and Cosmology
Cosmology
"Energy is not conserved" vs. energy is conserved: Friedmann Equations
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[QUOTE="PAllen, post: 6869309, member: 275028"] But note, the Bondi energy is, by construction, not necessarily conserved even when it is well defined. The difference between the conserved ADM energy and Bondi energy is the energy of radiation (including gravitational) reaching infinity. Thus, the Bondi energy decreases for an isolated pair of co-orbiting bodies embedded in asymptotically flat spacetime, for example. [/QUOTE]
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Astronomy and Cosmology
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"Energy is not conserved" vs. energy is conserved: Friedmann Equations
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