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Published: April 5, 2022, 7 p.m.

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In this week\'s live Questions and Answers show, I explain how big black holes are, what coordinate system astronomers use to map objects in the sky, and what could have collapsed clouds of hydrogen to form the first stars?

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00:00 Start
\\n00:42 How big are black holes?
\\n03:15 What coordinate system do astronomers use to map objects in space?
\\n06:50 What created the first stars?
\\n08:19 If Planet 9 is a black hole, how could we detect it?
\\n10:10 How do gamma rays escape the gravity of a black hole?
\\n11:04 Any alternative theories to the Big Bang that I find convincing?
\\n14:51 Where is Starman right now?
\\n15:44 How do we know the shape of the Milky Way?
\\n18:50 How far is James Webb in light-seconds?
\\n19:45 Are filaments and dark matter related?
\\n21:24 How do orbits become and stay stable?
\\n24:11 How dangerous is the Universe to life?
\\n27:39 What do I think of the Dark Forest theory?
\\n29:25 Are rubble pile asteroids dead comets?
\\n30:52 Are some galaxies more habitable?
\\n32:03 Could a Dyson Sphere stay inflated by the Solar Wind?

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Want to be part of the questions show? Ask a short question on any video on my channel. I gather a bunch up each week and answer them here.

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Astronomy Cast: Award-winning, long-running deep dive into space and astronomy with Fraser and Dr. Pamela Gay.
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\\nEmail: frasercain@gmail.com

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