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I've missed the top space news. Today, astrophysicist Olga Silchenko and I discuss various counterintuitive concepts: why galaxies are moving away from each other "faster" than the speed of light, was the world ever flat, how observations from the James Webb telescope undermine the Big Bang theory, what lies beyond the universe, and do they even exist?

But honestly, this episode is valuable to me because it very clearly articulates the idea of ​​"redshifts" and how they help determine the ages of galaxies and stars. It seems like a simple concept, but it's hard to find a clear and understandable explanation of it.

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0:00 - What's faster than the speed of light?
0:32 - How many galaxies are there in the universe?
1:47 - What are "dwarf galaxies"?
2:34 - How does gravity work in the universe?
4:04 - How does the expansion of space work?
6:24 - How can space expand faster than the speed of light?
9:15 - Ancient galaxies and the rate of star formation
13:55 - What's wrong with the Big Bang theory?
16:12 - How did galaxies form?
18:25 - What spins galaxies and how does their speed increase?
20:06 - Was the world originally flat?
23:38 - How do we know the age of objects in the universe?
24:22 - The multiverse in space
27:36 - How was the existence of dark matter first proposed?
33:31 - The "catastrophe" of dark energy
35:27 - About the speed of gravity
36:32 - What is the "horizon of the universe"? Does it have an end?
37:30 - Voids in the universe and the distribution of matter
41:34 - How do black holes form?
43:09 - How did the supermassive black holes at the centers of galaxies form?
44:18 - Paradoxes of the Universe and Its Time
45:45 - How to Estimate the Mass of Black Holes?
47:28 - What is a quasar? Why does it glow?
49:27 - What should the James Webb telescope find?
53:30 - What on Earth is as effective at studying space as the James Webb?
56:51 - What should the Large Hadron Collider find?
58:58 - What is the chemical composition of galaxies? How does it form?
1:04:27 - What haven't we yet discovered about the chemistry of the cosmos?
1:06:43 - How did the evolution of the universe unfold?
1:09:07 - Can a galaxy self-destruct?
1:10:10 - Progenitor of the Galaxy
1:10:31 - Thanks for watching! Find Olga Kasyanovna's music on YouTube

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#foundation #space #universe