Conny Aerts

It can take several, several months in period.

Well, for the sun, it's five minutes, by the way.

For those who don't know, the solar quakes go up and down, create sound waves with periods of about a few minutes, five minutes at their strongest.

So for a very big blue supergiant star, it takes months before the quake went up and down.

Yes, and that's even fast.

Yes, that's.

That's true, yeah.

So the energy of each wave can be quite tremendous, but that also depends on the type of waves that you're dealing with.

Very grateful to be here.

Sure, and I use the term starquakes for popular lectures, but actually in our professional life, we speak of stellar oscillations.

So they're global oscillations, they're smooth, they're properly behaved.

So for stars, it's a bit less abrupt than for earthquakes, let's say.

But you would get seasick all the time, you know, because they would always be there, you know.

Okay.

If there's one word that I have to ask to that question, it is rotation of stars.

That's more than one word, but internal rotation of stars.

Why is that?

Let me give the analogy with music again.

So we have sound waves that are happening inside the star, but the gas in the star is rotating around.

And what do you get when you put a musician in a theater play and you make the podium rotate just for the fun of it, as a surprise to the musician?