› Forums › General Discussion › Betelgeuse › Shrinkage.
2 January 2020 at 10:32 am
#581856
![](https://britastro.org/wp-content/uploads/2018/09/picture-8621-1537263177-80x80.jpg)
Participant
If the radius dropped I would expect the temperature to rise, not fall, as the gravitational potential energy is converted to thermal kinetic energy.
Again, curious.