Saturday, 5 May 2018

cosmology - Is the total mass of the universe decreasing?


Nuclear fusion leads to conversion of a small amount of mass in to energy. However, no (or a few) physical phenomenon appears to convert energy into mass.


As we have so many stars with large scale fusion occurring at the core. Is the net mass of the universe decreasing?




I found a relevant note on black holes, which says:




As per Hawking: The matter is converted to energy and some of the energy gets converted to equal amounts of matter and antimatter, the matter goes out of the black hole, but the antimatter goes inside the black hole and in turn decreases its mass. Ultimately after millions or even billions of years, the black hole will be evaporated away. completely. So that means every matter that goes into the black hole is responsible for its destruction.





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