The "WTF” star and its strange dimming (it's not aliens) | Unsolved Mysteries
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An astrophysicist reacts to Carl Sagan's Contact
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How does Mercury's orbit prove General Relativity?
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How do we know there's a black hole in every galaxy centre? | History of Supermassive Black Holes
44:43
The First Image of Tabby's Star Structure Featuring Dr. David Kipping
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Was Einstein "wrong"? | Testing new theories of gravity
20:36
What would happen if an asteroid was on a collision course with Earth? | Night Sky News May 2019
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An Astrophysicist's Top 10 Unsolved Mysteries
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