A astronomy cast, episode 488, Dark Energy Update.

Welcome to astronomy cast, our weekly facts-based journey through the cosmos where we help you

understand only what we know, but how we know what we know.

I'm Fraser Kaine, publisher of the universe today with me, as always, is the recovering

Dr. Pamela Gay, the director of technology and citizen science at the Astronomical Society

of the Pacific and the director of cosmocost.

Hey Pamela, how are you feeling?

I'm doing so much better than last week.

I, for those of you who didn't follow my travails on Twitter, I started it out with the

world's worst head cold, then developed strep throat, and then kind of wanted to die.

Oh, ho.

So I'm doing better now.

My voice is back mostly.

I think all of me is at about 95%.

Oh good.

Good.

That last 5% though, we won't need it.

I hope not.

All right.

So the updates continue.

Last week we talked about dark matter.

And this week we continue with its partner, dark energy.

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