Astronomy Cast

Ep. 15: Listener Questions Answered


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We finally get organized enough deal with several listener questions: isn�t dark matter just regular stuff we can�t see? how can parts of the Universe be expanding faster than the speed of light? what will Betelgeuse look like when it explodes as a supernova? what�s the speed of gravity? All these and more questions are answered.
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Astronomy CastBy Fraser Cain and Dr. Pamela Gay