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Ask a Spaceman!

AaS! 100: Why avoid the cosmic voids?

Ask a Spaceman!

Paul M. Sutter

Astrophysics, Science, Cosmos, Holes, Black, Astronomy, Natural Sciences, Universe, Cosmology, Space, Physics

4.8853 Ratings

🗓️ 19 March 2019

⏱️ 31 minutes

🧾️ Download transcript

Summary

How do cosmic voids form? What do they teach us about dark energy? What did the early universe look like? What does all this have to do with cupcakes? I discuss these questions and more in today’s Ask a Spaceman!

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Big thanks to my top Patreon supporters this month: Robert R, John, Matthew K, Helge B, Justin Z, Matt W, Justin G, Kevin O, Duncan M, Corey D, Kirk B, Barbara K, Neuterdude, Chris C,Erik M, Tim R, Neil L, Gordon M, Joe R, Neil P, Gabriella G, Tom S, Bryan D, Irene P, Dustin R, Matt C, Iothian53, Steve P, Debra S, Ken L, Alberto M, Ron W, Chris L, Mark R, Alan B, Stephen J, David P, John F, Maureen R, Frank T, Craig B, Jesse A, Ron S, Steven L, Mark R, Ulfert B, Hector P, Dave L, Stace J, S Stark, Richard K, Vladimir Z, Carol S, Stephen M, Grace M, Jeremy K, Russell W, Thomas S, David B, Tamara F, Robert B, Fr Bruce W, Catherine R, Nicolai B, Sean M, and Nate H!

Music by Jason Grady and Nick Bain. Thanks to Cathy Rinella for editing.

Hosted by Paul M. Sutter, astrophysicist at The Ohio State University, and the one and only Agent to the Stars (http://www.pmsutter.com).

Transcript

Click on a timestamp to play from that location

0:00.0

All right, let's say I give you a cupcake.

0:09.4

We all like cupcakes, right?

0:10.6

So you're not going to complain that I gave you a cupcake, and we're not going to,

0:14.0

it's just going to be a vanilla cupcake, all right?

0:16.6

Just you don't get to pick the flavor.

0:18.6

And this is my analogy.

0:20.4

All right?

0:20.8

This is my analogy. And you're

0:22.2

getting a vanilla cupcake with vanilla frosting and sprinkles. Okay. Now, I give you the cupcake. And

0:30.1

you take a bite and you like the cupcake. You take it home. You're at home. You take a slice out

0:35.3

of it because you slice cupcakes instead of just eating them face first like you ought to.

0:39.4

And you take a bite and you really like it. And you want to make your own cupcake. Just like it because one wasn't enough. You want a whole dozen cupcakes.

0:48.7

So what do you do? You only have this one cupcake. You only have this one thing to study to help you understand how cupcakes work. So you make some observations. You taste it again. You poke it. You know, maybe you burn a little piece of it. You get out some instruments of thermometer.

1:12.1

You take some basic, basic data about the cupcake.

1:15.9

And then you start cooking.

1:19.0

You know, maybe you put in a bunch of random ingredients like olive oil and anchovies and ice cream and try to mix it together and make a cupcake and

1:31.2

horribly fail of course but over time maybe you get a little bit smarter you realize maybe

1:37.6

you need some flour maybe an egg and some sugar and some sort of leavening ingredient. You start to get some salt. Don't

1:46.9

forget the salt. Salt is very important. You start to get some basic idea. And you start not just

1:52.6

with playing with the ingredients, but also the recipe. When do you mix the ingredients together?

1:58.3

How much of each ingredient? How long do you cook it? How just,

2:02.4

et cetera, et cetera. Eventually, with enough time and enough money, enough effort, you might be

...

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