As hinted at in the title, assuming the technology/means existed that could absorb energy fast enough, would it be possible to stop a star from going supernova, effectively “calming” it?
This is for a novel (not exactly a sci-fi one) but I’d like to keep in the realms of “technically possible”.
The main reason why a star collapses is because it’s taking more energy to fuse elements than it gets from the fusion, this happens around the time the star starts fusing iron. Absorbing more energy from the Star during that phase would actually exacerbate the problem. You would need to find a way to inject more energy into the core, but not so much that it would exceed the gravitational pressure and cause the star to rip itself apart. It would be like trying to balance a bowling ball on a pin during an earthquake until the fuel ran out. And the fuel would run out very fast.
It would take Godlike levels of technology and it’s still unlikely to work, even with that level of tech.