Conny Aerts

It can really change the lifetime of the star.

So that's... And Matt, if you were in the center of a star, you'd be dense too.

Yeah, so you can have all sorts of reasons why stars have these oscillations, right?

And they can indeed be caused by the fierce turbulence in the core of a very massive star because it's, you know, we call that convection, turbulent motions, and they create waves also because, again, they make the gas, you know, compress and expand.

But there are also other reasons why stars can have starquakes.

Think of the Earth-Moon system and tides.

Well, half of the stars, or even more if you go to higher masses, they live together with two.

And then they have tidal forces.

That's okay.

That's okay.

That's right.

They rotate around each other and they pull.

They give a tidal pull, right?

And so you could also say that, for me, tidal forces are actually forced oscillation.

You know, I say everybody oscillates in nature.

So when the stars are close enough together, the tidal oscillations, as I call them,

very strong, can be very strong.

So that's another reason why stars can have... So these are like a tidal bulge in the direction of the object responsible for it.

You want to prevent it, but we like it when it started.

Well, Betelgeuse is behaving normally as a star.