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in mass of the Sun?

mass Sun
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in mass of the Sun?

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I know of no data that directly measure the change in mass of the Sun as a result of eruptions and conversion to energy. Those changes are necessarily slight: even the dense coronal mass ejections qualify as pretty darned good vacuum, with something like 100 billion particles (10^11) per cubic centimeter. (At 1 atmosphere, you have something 3 x 10^19 air molecules per cubic centimeter around you; so the CME last week was 1/100,000,000th as dense as your environment.) The LASCO scientists do have methods for estimating the mass of a given CME. Ultimately, all the CMEs throughout the entire lifetime of the Sun will not subtract much mass at all. And a star like the Sun cannot fuse all of its hydrogen into helium, so fusion will not consume the Sun, either. (Fusion can only occur in a dense, hot stellar core. When the core runs out of usable hydrogen, it fuses the helium, and so forth, until it can fuse no heavier elements. That is when the fun begins. However, there may be discrepancies

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