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How is mass curving spacetime?

In the GR Einstein's interpretation was in terms of a deformation of the geometry of the space ending in a curvature of spacetime. I've thought that mass could do this by interacting with other m…
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Biomass Dictionary of astronomy, letter B Biomass is a generic term used to refer to the organic matter accumulated in some living being, population, place, trophic level or ecosystem. Biomass contains solar energy in the form of chemical bonds. Therefore, the SAR also uses the term "biomass" to refer to organic matter originated in a biological process, spontaneous or provoked, usable as a source of energy.
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