Charles Liu

But I was at the American Astronomical Society meeting not too long ago in Phoenix.

And I was just so happy.

There was just a lovely time.

I'm still basking in it, even though it's been a little while.

But one of the last speeches, one of the last talks in that conference was about the nature of dark energy.

The dark energy survey, which has now gathered information about 15 million galaxies and where they're placed in the universe, seems to show that what we have counted as dark energy, the cosmological constant,

is probably not constant.

It looks like it's actually changing, which is really amazing, which adds still more speculation as to what this dark energy actually is, because you have to account for the fact that it looks like the universe doesn't have a constant cosmological constant.

No, it just means that lambda, the number that he had put as a number, is a function of time.

It changes the equations.

It means that Albert was just – and he himself admitted it.

It was a temporary thing that made the equations work.

He had no idea if there was anything physical about it.

Right.

And so now we're actually trying to see whether Albert's prediction of its existence is leading to something physical.

And so the fact that it might be dependent on time or the age of the universe is further evidence that it is something physical and not just mathematical.

Oh, snap.

Yeah.

Okay.

Absolutely.