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Ask a Spaceman!

AaS! 125: Does Planet Nine exist?

Ask a Spaceman!

Paul M. Sutter

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

4.8853 Ratings

🗓️ 7 April 2020

⏱️ 35 minutes

🧾️ Download transcript

Summary

Why do we think the solar system might have another planet? Why do we think it doesn’t? How do test for something that’s too far away to see? I discuss these questions and more in today’s Ask a Spaceman!

Support the show: http://www.patreon.com/pmsutter
All episodes: http://www.AskASpaceman.com

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Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE!

Big thanks to my top Patreon supporters this month: Matthew K, Justin Z, Justin G, Kevin O, Duncan M, Corey D, Barbara K, Neuterdude, Chris C, Robert M, Nate H, Andrew F, Chris L, Jon, Cameron L, Nalia, Aaron S, Kirk T, Dr. Johnny Fever, Tim R, Joe R, Neil P, 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, Steven L, Ulfert B, Dave L, Stace J, S Stark, Richard K, Carol S, Stephen M, Grace M, Jeremy K, Russell W, David B, Tamara F, Robert B, Fr Bruce W, Catherine R, Nicolai B, Sean M, Nate H, Edward K, Ped, Chuck C, Jose Pablo V, Stephen S, Elizabeth W, Eric F, Tracy F, Roger G, Callan R, Nils M, John W, George, Tom G, Monika, Michael H, Tom, Sarah K, Robert S, and Gerald!

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

Hosted by Paul M. Sutter, astrophysicist 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

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0:07.9

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0:15.7

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0:21.4

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0:26.4

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0:31.4

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0:37.3

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0:40.5

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0:43.9

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0:46.7

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0:49.7

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0:52.9

That's oracle.com slash bandwidth.acle.com slash bandwidth. That's oracle.com slash bandwidth. Oracle.com

0:56.1

slash bandwidth.

1:01.3

How do you know something is there, even if you can't see it? It's a tough problem, isn't it? There are many things I've

1:13.2

discussed in this show that we know, even though we've never seen it. We've never seen the

1:18.5

inside of a supernova as it went off in our backyard and let's hope we never do. And yet we kind of

1:24.4

sort of know how the inside of a supernova works. We've never seen a planet forming in real time. And yet we kind of sort of know how the inside of a supernova works. We've never seen a planet

1:28.6

forming in real time, and yet we kind of sort of know how it works. We can't see dark matter,

1:34.3

it's in the name, and yet we have a pretty decent idea of how it works. But there is something

1:40.4

special about seeing, about direct observation, about holding it in your hands and

1:46.9

showing it to the class that you want to be able to point to it and say, yep, right there,

1:51.5

it exists.

...

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