AaS! 19: How Do Planets Get Magnetic Fields?
Ask a Spaceman!3 Marras 2015

AaS! 19: How Do Planets Get Magnetic Fields?

How do planets get their magnetic fields? What's a dynamo? What do magnetic fields have in common with plate tectonics? I discuss these questions and more in today's Ask a Spaceman!

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AaS! 265: Does Antimatter Fall Up?

AaS! 265: Does Antimatter Fall Up?

What is the weak equivalency principle? How was antimatter discovered and why is it the perfect thing to put gravity to the test? What did the CERN experiment discover? I discuss these questions and m...

3 Helmi 27min

AaS! 264: Just How Weird is the Quantum Eraser?

AaS! 264: Just How Weird is the Quantum Eraser?

How does the double-slit experiment work? What does it teach us about reality and measurement if we try to mess with the experiment after it's already started? How does quantum complementarity guide u...

20 Tammi 29min

AaS! 263: Does Free Will Exist?

AaS! 263: Does Free Will Exist?

What is causal determinism? What are some of the ways that physics can permit free will? What does emergence have to do with all of this? I discuss these questions and more in today's Ask a Spaceman! ...

6 Tammi 30min

AaS! 262: Does the Universe Have Extra Dimensions?

AaS! 262: Does the Universe Have Extra Dimensions?

What do extra dimensions have to do with the strength of gravity? What is a tower of gravitons? How can we detect extra dimensions even if we can't perceive them? I discuss these questions and more in...

16 Joulu 202532min

AaS! 261: What are Black Dwarfs?

AaS! 261: What are Black Dwarfs?

What happens to a white dwarf when it cools off? How long does it take? Do they just stay black forever, or will something more interesting happen to them someday? I discuss these questions and more i...

2 Joulu 202536min

AaS! 260: What's the Big Deal with the Weak Force?

AaS! 260: What's the Big Deal with the Weak Force?

How did we discover the weak nuclear force? Why is it so strange compared to the other forces? What do mirrors have to do with all of this? I discuss these questions and more in today's Ask a Spaceman...

18 Marras 202531min

AaS! 259: Where Exactly is the Edge of the Universe?

AaS! 259: Where Exactly is the Edge of the Universe?

Is the universe infinite? What about the cosmological horizons, the limits to what we can see? Will we ever know for sure what's beyond them? I discuss these questions and more in today's Ask a Spacem...

4 Marras 202523min

AaS! 258: What's Going to Happen After the ISS?

AaS! 258: What's Going to Happen After the ISS?

Why did we develop the International Space Station in the first place? What have we learned in its 25+ years of operation? When is it coming down, and why? And what's coming up next? I discuss these q...

21 Loka 202532min

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