AaS! 218: How Do We Know What the Milky Way Looks Like?
Ask a Spaceman!20 Feb 2024

AaS! 218: How Do We Know What the Milky Way Looks Like?

Why is it so hard to get a picture of the Milky Way? How much of our galaxy have we mapped? What the heck is a "barred spiral" and what does that have to do with our core? I discuss these questions and more in today's Ask a Spaceman!

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Thanks to Cathy Rinella for editing.

Hosted by Paul M. Sutter.

Avsnitt(276)

AaS! 230: Is the Universe Making Any New Galaxies?

AaS! 230: Is the Universe Making Any New Galaxies?

How do galaxies form and evolve? Is the universe still making new ones? What will happen to the current galaxies in the universe? I discuss these questions and more in today's Ask a Spaceman! Support ...

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AaS! 229: Is the James Webb Breaking Cosmology?

AaS! 229: Is the James Webb Breaking Cosmology?

What has the James Webb Space Telescope learned so far? Is it finding galaxies that "break" cosmology? What will we learn next? I discuss these questions and more in today's Ask a Spaceman! Support th...

6 Aug 202435min

AaS! 228: Can a Galaxy Be Destroyed?

AaS! 228: Can a Galaxy Be Destroyed?

Can galaxies ever get destroyed? What happens to their stars? Do galaxies ever die? I discuss these questions and more in today's Ask a Spaceman! Support the show: http://www.patreon.com/pmsutter All...

16 Juli 202430min

AaS! 227: Where is the Center of the Universe?

AaS! 227: Where is the Center of the Universe?

What does it mean for the universe to have a center? Could we ever travel to ours? What is a singularity? I discuss these questions and more in today's Ask a Spaceman! Support the show: http://www.pat...

2 Juli 202435min

AaS! 226: Does the Universe Get Shorter When You Go Faster?

AaS! 226: Does the Universe Get Shorter When You Go Faster?

How does length contraction work in relativity? Do moving objects really get shorter? What about from their perspective? How are we supposed to make sense of any measurement? I discuss these questions...

18 Juni 202436min

AaS! 225: What is the Cosmic Flaw That Shouldn't Exist?

AaS! 225: What is the Cosmic Flaw That Shouldn't Exist?

What is the "cold spot" on the cosmic microwave background? Why shouldn't it exist? What are some possible explanations for it, and why are they unsatisfying? I discuss these questions and more in tod...

4 Juni 202440min

AaS! 224: Can Life Survive on Locked Planets?

AaS! 224: Can Life Survive on Locked Planets?

How do planets get tidally locked? What are these systems typically like? Can life find a home in such a challenging environment? I discuss these questions and more in today's Ask a Spaceman! Support ...

21 Maj 202436min

AaS! 223: Why is it So Hard to Return to the Moon?

AaS! 223: Why is it So Hard to Return to the Moon?

If we went to the Moon already, why can't we go back so easily? What technology have we lost? What are we trying to do differently? I discuss these questions and more in today's Ask a Spaceman! Suppor...

7 Maj 202433min

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