Betelgeuse Breathing

szyzyg writes "For the fisrt time ever astronomers have been able to observe waves and flows on the surface of a star other than the sun. Alex Lobel and Andrea Dupree managed to detect these flows on the surface of the supergiant Betelgeuse - the bright red star in the constellation of Orion. This star is so large that its radius is about the same as the distance at which the earth orbits.... i.e. about 150 million km. It's almost at the upper limit for stellar sizes predicted by Eddington "