You’re Almost Entirely Empty Space, What Defines Seconds, and the Lyrid Meteor Shower

Curiosity Weekly

Warner Bros. Discovery

Self-improvement, Science, Astronomy, Education

4.6 • 935 Ratings

🗓️ 21 April 2019

⏱️ 9 minutes

🔗️ Recording | iTunes | RSS

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Summary

Learn about why you’re almost completely made up of empty space; what defines a second of time; and where you can watch the Lyrid meteor shower this Tuesday.

In this podcast, Cody Gough and Ashley Hamer discuss the following stories from Curiosity.com to help you get smarter and learn something new in just a few minutes:

You're Almost Completely Made Up of Empty Space — https://curiosity.im/2Gq85KQ
Here's How You Can Watch the Lyrid Meteor Shower in 2019 — https://curiosity.im/2GcOP3e

Additional resources discussed:

Why is a day divided into 24 hours? (Intermediate) | Astronomy Department at Cornell University — http://curious.astro.cornell.edu/physics/161-our-solar-system/the-earth/day-night-cycle/761-why-is-a-day-divided-into-24-hours-intermediate
Why are there 24 hours in a day? | ABC Science — http://www.abc.net.au/science/articles/2011/11/15/3364432.htm
Using Particle Physics for Measurement Shows Just How Far Measurement Has Come | Curiosity.com — https://curiosity.im/2GpdZfj

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Find episode transcript here: https://curiosity-daily-4e53644e.simplecast.com/episodes/youre-almost-entirely-empty-space-what-defines-seconds-and-the-lyrid-meteor-shower

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Transcript

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0:00.0	Hi, we're here from curiosity.com to help you get smarter in just a few minutes.
0:05.2	I'm Cody Gough. And I'm Ashley Hamer.
0:07.1	Today you learn about why you're almost completely made up of empty space,
0:10.7	and where you can watch the Lyrid Meteor shower this Tuesday.
0:14.0	We'll also answer a listener question about what defines a second.
0:18.0	Let's define some curiosity.
0:20.0	Does that make any sense?
0:21.0	No, okay.
0:22.0	Want to hear something trippy? You're almost completely
0:25.1	made up of empty space. In fact, a lot of the matter around us is empty space, as
0:31.0	in 99.9999999% of all the matter around us.
0:37.6	It's a lot of nines.
0:39.0	That's so wild.
0:40.1	Here's the deal. Everything around us is made up of atoms, tiny particles with a nucleus surrounded by electrons.
0:47.5	These tiny particles are filled with energy, but they are surrounded by quite a bit of empty space.
0:53.2	If you took the empty space out of every human on Earth,
0:56.2	you can compress the entire human population down to an object
1:00.0	smaller than a sugar cube.
1:01.8	Obviously, though, things still feel solid right?
1:04.6	The headphones you're wearing, the car you're driving in, the thing you're standing on
1:08.6	are sitting in right now, and that's because of what's in that empty space.
1:13.0	See, atoms aren't stagnant particles.
	...

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