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PBS Space Time

Season 2016 • Episode 11 • Why is the Earth Round and the Milky Way Flat?

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PBS Space Time Season 2016, Episode 11: Why is the Earth Round and the Milky Way Flat?

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Episodes

48 episodes
1

The True Nature of Matter and Mass

We know that mass is energy… but what is energy? And where did matter and time even come from? Matt begins to dive into these intricate topics by first examining what inertial mass is, how it relates to gravitational mass, and what it all means for mass as a fundamental property.

11 min
2

When Time Breaks Down

10 min
3

The Photon Clock Challenge

3 min
4

The Origin of Matter and Time

13 min
5

Will Mars or Venus Kill You First?

11 min
6

LIGO's First Detection of Gravitational Waves!

10 min
7

Planet X Discovered?? + Challenge Winners!

9 min
8

Why the Big Bang Definitely Happened

13 min
9

What's Wrong With the Big Bang Theory?

13 min
10

Cosmic Microwave Background Challenge

6 min
11

Why is the Earth Round and the Milky Way Flat?

15 min
12

How Cosmic Inflation Flattened the Universe

14 min
13

Pulsar Starquakes Make Fast Radio Bursts? + Challenge Winners!

10 min
14

We Are Star Stuff

14 min
15

Will the Universe Expand Forever?

14 min
16

Why the Universe Needs Dark Energy

13 min
17

What Does Dark Energy Really Do?

13 min
18

Will Starshot's Insterstellar Journey Succeed?

13 min
19

The Cosmic Conspiracy of Dark Energy Challenge Question

8 min
20

Anti-gravity and the True Nature of Dark Energy

15 min
21

Is an Ice Age Coming?

16 min
22

Is Quantum Tunneling Faster than Light?

12 min
23

New Fundamental Particle Discovered?? + Challenge Winners!

14 min
24

The Strange Universe of Gravitational Lensing

14 min
25

Planck's Constant and The Origin of Quantum Mechanics

16 min
26

Nuclear Physics Challenge

5 min
27

Juno to Reveal Jupiter's Violent Past

14 min
28

The Future of Gravitational Waves

9 min
29

The Quantum Experiment that Broke Reality

14 min
30

Can We Survive the Destruction of the Earth? ft. Neal Stephenson

14 min
31

How the Quantum Eraser Rewrites the Past

15 min
32

Quantum Eraser Lottery Challenge

6 min
33

Should We Build a Dyson Sphere?

The Kepler telescope recently noticed a strange partial eclipse that some have speculated could be a Dyson Sphere. Are Dyson Sphere's possible? Are they practical? What other alternatives to futuristic energy capture do we have to choose from? Why not a kugelblitz - a swarm of black hole powered engines?

15 min
34

Is There a Fifth Fundamental Force? + Quantum Eraser Answer

9 min
35

Self-Replicating Robots and Galactic Domination

We’ll soon be capable of building self-replicating robots. This will not only change humanity’s future but reshape the galaxy as we know it.

13 min
36

Quantum Entanglement and the Great Bohr-Einstein Debate

Albert Einstein strongly disagreed with Niels Bohr when it came to Bohr’s interpretation of quantum mechanics. Quantum entanglement settled the argument once and for all.

15 min
37

Life on Europa?

The Hubble Telescope found more evidence of vast plumes of water bursting through the icy surface of Jupiter’s moon Europa. What does this tell us about the potential for life on Europa?

14 min
38

Are We Alone? Galactic Civilization Challenge

The Drake Equation tells us the likelihood that there are other advanced technological civilizations waiting for us among the stars. In this episode of Space Time we challenge you to use the Drake Equation to help us determine how near or far these alien races may be. Links to reference material below.

7 min
39

Black Holes from the Dawn of Time

Primordial black holes may be lurking throughout our universe. How large are they, how many are out there and what would happen if they moved through our solar system?

14 min
40

The First Humans on Mars

Elon Musk’s SpaceX program proposes that 100 people could be sent to colonize Mars within 10 years. What might that colony look like?

12 min
41

The Many Worlds of the Quantum Multiverse

Is our universe a definitive single reality or is it merely one within an infinitely branching multiverse?

13 min
42

Quantum Vortices and Superconductivity + Challenge Answers

10 min
43

Did Dark Energy Just Disappear?

16 min
44

Strange Stars

14 min
45

Pilot Wave Theory and Quantum Realism

17 min
46

What Happens at the Event Horizon?

20 min
47

Escape The Kugelblitz Challenge

9 min
48

Have They Seen Us?

Are aliens watching Earth TV? We'd like to credit the SKA Organization for the image used in the thumbnail.

18 min