Kelly Holley-Bockelmann

massive black holes and and that are that are merging.

And it takes just that.

Right.

And that makes sense because the array, even though it's big, it's like four kilometers long for each of the arms.

And so like the wavelength of the gravitational wave kind of fits in that size.

And so if you want to detect things that are much more massive, you need really, really, really long arms and arms that are so long that they're bigger than the entire Earth.

You need to go into space.

No.

Yeah.

So the so Lisa is an interferometer that is that has arms that are like sort of in a triangle shape.

And the length between the two spacecraft, the arms are like twenty two point five million kilometers, which is like.

It is so big that if you were to put it around the sun, which don't do that because it's not a good idea.

But if you were to do that, the sun would fit right, right in it.

So it's like a square sized telescope.

Yeah, it's actually a misnomer that you even do that.

You definitely don't want to station keep.

You don't want to move these masses around at all.

What you want to do is let these test masses, that's what they're called.

They're roughly two kilogram gold and platinum cubes.

They are mapping spacetime.